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Beta-Amino Acids

β-peptides and other β-amino acid containing oligomers have emerged as very promising tools in medicinal chemistry, as they often exhibit remarkable biological activity together with enhanced biological stability, especially towards common peptidases. Hybrid α- and β-oligopeptides have shown compatibility with native biological systems while still affording the advantages offered by β-amino acids. Another important aspect of β-peptide oligomers is their ability to fold into well defined and stable helical, turn and pleated sheet conformations in solution, oftentimes displaying a reverse orientation of their α-amino acid counterparts. Sigma-Aldrich offers a variety of β-amino acids, including those with Boc- and Fmoc- functionality, for β-peptide synthesis.

Learn More about Beta-Amino Acids
Beta-Amino Acids and Homo Amino Acids

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59891 N-Acetyl-DL-β-phenylalanine ≥97.0% (HPLC) C11H13NO3
146064 β-Alanine 99% C3H7NO2
05160 β-Alanine BioXtra, ≥99.0% (NT) C3H7NO2
306142 β-Alanine ethyl ester hydrochloride 98% C5H11NO2 · HCl
05210 β-Alanine methyl ester hydrochloride ≥98.0% (AT) C4H9NO2 · HCl
573450 3-Amino-3-(3-bromophenyl)propionic acid 97% C9H10BrNO2
A44207 3-Aminobutanoic acid 97% C4H9NO2
68602 cis-2- Amino-3-cyclopentene-1-carboxylic acid hydrochloride ≥97.0% (AT) C6H9NO2 · HCl
217794 DL-3-Aminoisobutyric acid 98% C4H9NO2
08290 DL-β-Aminoisobutyric acid puriss., ≥99.0% (NT) C4H9NO2
714194 (R)-3-Amino-2-phenylpropionic acid ≥98% (HPLC) C9H11NO2
15382 Boc-β-Ala-OH ≥99.0% (TLC) C8H15NO4
41844 (±)-3-(Boc-amino)-4-(4-biphenylyl)butyric acid ≥98.0% (HPLC) C21H25NO4
80393 cis-3-(Boc-amino)cyclohexanecarboxylic acid ≥98.0% (TLC) C12H21NO4
09784 (1S,3R)-(+)-3-(Boc-amino)cyclopentanecarboxylic acid ≥96.0% (HPLC) C11H19NO4
15058 (2R,3R)-3-(Boc-amino)-2-hydroxy-4-phenylbutyric acid ≥98.0% C15H21NO5
15059 (2S,3R)-3-(Boc-amino)-2-hydroxy-4-phenylbutyric acid ≥98.0% (TLC) C15H21NO5
670758 2-(Boc-aminomethyl)phenylacetic acid ≥99.0% C14H19NO4
78953 (R)-3-(Boc-amino)-2-methylpropionic acid ≥98.0% (TLC) C9H17NO4
40195 (S)-3-(Boc-amino)-2-methylpropionic acid ≥98.0% (TLC) C9H17NO4
73300 (R)-3-(Boc-amino)-4-(2-naphthyl)butyric acid ≥98.0% (HPLC) C19H23NO4
78018 (R)-3-(Boc-amino)-5-phenylpentanoic acid ≥97.0% (HPLC) C16H23NO4
714186 (R)-3-(Boc-amino)-2-phenylpropionic acid ≥98.0% (HPLC) C14H19NO4
74037 (R)-Boc-4-bromo-β-Phe-OH ≥98.0% (HPLC) C14H18BrNO4
93123 (S)-Boc-4-bromo-β-Phe-OH ≥98.0% (HPLC) C14H18BrNO4
73086 (R)-Boc-4-chloro-β-Homophe-OH ≥98.0% (HPLC) C15H20ClNO4
81771 (S)-Boc-4-chloro-β-Homophe-OH ≥98.0% (HPLC) C15H20ClNO4
61902 (R)-Boc-4-chloro-β-Phe-OH ≥98.0% (HPLC) C14H18ClNO4
19343 (S)-Boc-4-chloro-β-Phe-OH ≥98.0% (HPLC) C14H18ClNO4
91919 (S)-Boc-2-cyano-β-Homophe-OH ≥98.0% (HPLC) C16H20N2O4
90368 (R)-Boc-4-cyano-β-Homophe-OH ≥98.0% (HPLC) C16H20N2O4
81834 (S)-Boc-4-cyano-β-Homophe-OH ≥98.0% (HPLC) C16H20N2O4
89178 (R)-Boc-3-cyano-β-Phe-OH ≥98.0% (HPLC) C15H18N2O4
12339 (R)-Boc-4-cyano-β-Phe-OH ≥98.0% (HPLC) C15H18N2O4
44376 (S)-Boc-4-cyano-β-Phe-OH ≥98.0% C15H18N2O4
08009 (R)-Boc-3,4-dimethoxy-β-Phe-OH ≥98.0% C16H23NO6
04542 (S)-Boc-3,4-dimethoxy-β-Phe-OH ≥98.0% (HPLC) C16H23NO6
82007 (S)-Boc-γ,γ-diphenyl-β-Homoala-OH ≥98.0% (HPLC) C21H25NO4
51006 (R)-Boc-4-fluoro-β-Phe-OH ≥98.0% (HPLC) C14H18FNO4
05102 (S)-Boc-4-fluoro-β-Phe-OH ≥98.0% (HPLC) C14H18FNO4
03651 Boc-β-Gln-OH ≥98.0% (TLC) C10H18N2O5
03691 Boc-β-Glu(OBzl)-OH ≥98.0% (HPLC) C17H23NO6
14974 Boc-β-Homoala-OH ≥98.0% (TLC) C9H17NO4
03674 Boc-β-Homoarg(Tos)-OH ≥98.0% (TLC) C19H30N4O6S
03667 Boc-β-Homogln-OH ≥98.0% (TLC) C11H20N2O5
14977 Boc-β-Homoglu(OBzl)-OH ≥98.0% (TLC) C18H25NO6
03683 Boc-β-Homohyp(Bzl)-OH (dicyclohexylammonium) salt technical, ≥85% (HPLC) C18H25NO5 · C12H23N
14975 Boc-β-Homoleu-OH ≥98.0% (TLC) C12H23NO4
14978 Boc-β-Homolys(Z)-OH ≥98.0% (TLC) C20H30N2O6
03661 Boc-β-Homomet-OH ≥98.0% (TLC) C11H21NO4S
670022 Boc-(S)-β2-homophenylalanine C15H21NO4
14979 Boc-β-Homophe-OH ≥98.0% (TLC) C15H21NO4
14982 Boc-β3-Homopro-OH ≥98.0% (TLC) C11H19NO4
03697 Boc-β-Homoser(Bzl)-OH ≥98.0% (HPLC) C16H23NO5
14976 Boc-β-Homothr(Bzl)-OH ≥98.0% (TLC) C17H25NO5
14981 Boc-β-Homotrp-OH ≥98.0% (TLC) C17H22N2O4
17008 Boc-β-Homotrp-OMe ≥98.0% (TLC) C18H24N2O4
03693 Boc-β-Homotyr(Bzl)-OH ≥97.0% (HPLC) C22H27NO5
03678 Boc-β-Leu-OH ≥98.0% (TLC) C11H21NO4
80674 Boc-D-β-Leu-OH ≥98.0% (TLC) C11H21NO4
52136 Boc-β-Lys(Z)-OH (dicyclohexylammonium) salt ≥98.0% (TLC) C19H28N2O6 · C12H23N
52169 (R)-Boc-3-methoxy-β-Phe-OH ≥98.0% (HPLC) C15H21NO5
55894 (S)-Boc-3-methoxy-β-Phe-OH ≥98.0% (HPLC) C15H21NO5
56999 (R)-Boc-4-methoxy-β-Phe-OH ≥98.0% (HPLC) C15H21NO5
94557 (S)-Boc-4-methyl-β-Homophe-OH ≥97.0% (HPLC) C16H23NO4
06731 (R)-Boc-2-methyl-β-Phe-OH ≥98.0% C15H21NO4
06939 (S)-Boc-2-methyl-β-Phe-OH ≥98.0% (HPLC) C15H21NO4
42722 (R)-Boc-3-methyl-β-Phe-OH ≥98.0% (HPLC) C15H21NO4
59967 (S)-Boc-3-methyl-β-Phe-OH ≥98.0% (HPLC) C15H21NO4
90297 (R)-Boc-4-methyl-β-Phe-OH ≥98.0% (HPLC) C15H21NO4
90298 (S)-Boc-4-methyl-β-Phe-OH ≥98.0% (HPLC) C15H21NO4
09794 Boc-β-Phe-OH ≥96.0% (HPLC) C14H19NO4
09793 Boc-D-β-Phe-OH ≥98.0% (HPLC) C14H19NO4
95336 (R)-Boc-4-(4-pyridyl)-β-Homoala-OH ≥98.0% (HPLC) C14H20N2O4
93647 (S)-Boc-4-(4-pyridyl)-β-Homoala-OH ≥97.0% (HPLC) C14H20N2O4
87943 (S)-Boc-2-(trifluoromethyl)-β-Homophe-OH ≥98.0% (HPLC) C16H20F3NO4
81998 (S)-Boc-2-(trifluoromethyl)-β-Homophe-OH ≥98.0% (HPLC) C16H20F3NO4
94603 (S)-Boc-3-(trifluoromethyl)-β-Homophe-OH ≥98.0% (HPLC) C16H20F3NO4
94592 (R)-Boc-4-(trifluoromethyl)-β-Homophe-OH ≥98.0% (HPLC) C16H20F3NO4
55685 (S)-Boc-2-(trifluoromethyl)-β-Phe-OH ≥98.0% C15H18F3NO4
18328 (R)-Boc-3-(trifluoromethyl)-β-Phe-OH ≥95.0% (HPLC) C15H18F3NO4
69418 (S)-Boc-3-(trifluoromethyl)-β-Phe-OH ≥98.0% C15H18F3NO4
73999 (R)-Boc-4-(trifluoromethyl)-β-Phe-OH ≥98.0% (HPLC) C15H18F3NO4
18709 (S)-Boc-4-(trifluoromethyl)-β-Phe-OH ≥98.0% (HPLC) C15H18F3NO4
89090 (R)-Boc-β-Tyr-OH ≥97.0% (HPLC) C14H19NO5
56996 (S)-Boc-β-Tyr-OH ≥98.0% (HPLC) C14H19NO5
700959 Ethyl 3-(benzylamino)propionate 97% C12H17NO2
47587 Fmoc-β-Ala-OH ≥99.0% (HPLC) C18H17NO4
75561 (S)-3-(Fmoc-amino)-5-hexenoic acid ≥95.0% C21H21NO4
30975 (R)-3-(Fmoc-amino)-2-methylpropionic acid ≥95.0% (HPLC) C19H19NO4
38811 (S)-3-(Fmoc-amino)-2-methylpropionic acid ≥95.0% C19H19NO4
70796 (R)-3-(Fmoc-amino)-4-(2-naphthyl)butyric acid ≥95.0% C29H25NO4
72829 (S)-3-(Fmoc-amino)-4-(2-naphthyl)butyric acid ≥95% C29H25NO4
88574 (S)-Fmoc-3,4-difluoro-β-Homophe-OH ≥98.0% C25H21F2NO4
89846 (S)-Fmoc-γ,γ-diphenyl-β-Homoala-OH ≥98.0% (HPLC) C31H27NO4
87084 (R)-Fmoc-4-fluoro-β-Homophe-OH ≥98.0% (HPLC) C25H22FNO4
03652 Fmoc-β-Gln-OH ≥97.0% C20H20N2O5
03689 Fmoc-β-Glu(OtBu)-OH ≥95.0% (HPLC) C24H27NO6
47935 Fmoc-β-Homoala-OH ≥98.0% (HPLC) C19H19NO4
03673 Fmoc-β-Homoarg(Pmc)-OH ≥95.0% (HPLC) C36H44N4O7S
64179 Fmoc-β-Homogln(Trt)-OH ≥95.0% (HPLC) C40H36N2O5
47837 Fmoc-β-Homoglu(OtBu)-OH ≥96.0% (HPLC) C25H29NO6
03751 Fmoc-β-Homohyp(tBu)-OH ≥98.0% C25H29NO5
03671 Fmoc-β-Homoile-OH ≥96.0% (HPLC) C22H25NO4
47946 Fmoc-β-Homoleu-OH ≥96.0% C22H25NO4
47874 Fmoc-β-Homolys(Boc)-OH ≥95.0% (HPLC) C27H34N2O6
03658 Fmoc-β-Homomet-OH ≥97.0% (HPLC) C21H23NO4S
47878 Fmoc-β-Homophe-OH ≥95.0% (HPLC) C25H23NO4
18074 Fmoc-D-β-Homophe-OH ≥96% C25H23NO4
47912 Fmoc-L3-homoproline ≥98.0% (HPLC) C21H21NO4
47911 Fmoc-β-Homothr(tBu)-OH ≥96.0% (HPLC) C24H29NO5
47901 Fmoc-β-Homotrp-OH ≥96.0% (HPLC) C27H24N2O4
03692 Fmoc-β-Homotyr(tBu)-OH ≥98.0% C29H31NO5
03676 Fmoc-β-Leu-OH ≥97.0% (HPLC) C21H23NO4
85497 (S)-Fmoc-2-methyl-β-Homophe-OH ≥98.0% (HPLC) C26H25NO4
80587 (S)-Fmoc-3-methyl-β-Homophe-OH ≥98.0% (HPLC) C26H25NO4
09795 Fmoc-β-Phe-OH ≥98.0% C24H21NO4
00396 Fmoc-β-D-Phe-OH ≥98.0% (HPLC) C24H21NO4
73309 (R)-Fmoc-4-(3-pyridyl)-β-Homoala-OH ≥98.0% (HPLC) C24H22N2O4
94591 (S)-Fmoc-3-(trifluoromethyl)-β-Homophe-OH ≥97.0% (HPLC) C26H22F3NO4
03688 β-Glutamic acid hydrochloride ≥98.0% (TLC) C5H9NO4 · HCl
03766 L-β-Homoalanine hydrochloride ≥98.0% C4H9NO2 · HCl
03765 L-β-Homoglutamic acid hydrochloride ≥98.0% C6H11NO4 · HCl
03663 L-β-Homoglutamine hydrochloride ≥98.0% (TLC) C6H12N2O3 · HCl
03698 L-β-Homohydroxyproline hydrochloride ≥98.0% (TLC) C6H11NO3 · HCl
03669 L-β-Homoisoleucine hydrochloride ≥98.0% C7H15NO2 · HCl
03764 L-β-Homoleucine hydrochloride ≥98.0% C7H15NO2 · HCl
21625 DL-β-Homoleucine ≥99.0% (NT) C7H15NO2
03759 L-β-Homolysine dihydrochloride ≥98.0% (TLC) C7H16N2O2 · 2HCl
03681 L-β-Homomethionine hydrochloride ≥98.0% (TLC) C6H13NO2S · HCl
90205 DL-β-Homomethionine ≥99.0% (TLC) C6H13NO2S
03769 L-β-Homophenylalanine hydrochloride ≥98.0% C10H13NO2 · HCl
28217 DL-β-Homophenylalanine ≥98.0% (HPLC) C10H13NO2
03768 L-β-Homoproline′ hydrochloride ≥98.0% (TLC) C6H11NO2 · HCl
03694 L-β-Homoserine ≥98.0% (TLC) C4H9NO3
03767 L-β-Homothreonine ≥98.0% (TLC) C5H11NO3
03790 L-β-Homotryptophan hydrochloride ≥98.0% (TLC) C12H14N2O2 · HCl
03758 L-β-Homotyrosine hydrochloride ≥97.0% (HPLC) C10H13NO3 · HCl
03675 L-β-Leucine hydrochloride ≥98.0% C6H13NO2 · HCl
17988 DL-β-Leucine ≥98.0% (NT) C6H13NO2
159492 DL-β-Phenylalanine 98% C9H11NO2
670774 (R)-(−)-Pyrrolidine-3-carboxylic acid ≥99.0% (NT) C5H9NO2
670871 (S)-(+)-Pyrrolidine-3-carboxylic acid ≥98.0% (NT) C5H9NO2
28206 Z-D-β-Dab(Boc)-OH ≥98.0% (TLC) C17H24N2O6
95875 Z-β-Ala-ONp purum, ≥98.0% (HPLC) C17H16N2O6
17974 Z-β-Dab(Boc)-OH ≥98.0% (TLC) C17H24N2O6
21622 Z-β-Dab(Fmoc)-OH ≥98.0% (HPLC) C27H26N2O6
17984 Z-D-β-Dab(Fmoc)-OH purum, ≥98.0% (HPLC) C27H26N2O6
61669 Z-β-Homoala-OH ≥98.0% (HPLC) C12H15NO4
39748 Z-β-D-Homoala-OH ≥98.0% (HPLC) C12H15NO4
76024 Z-β-Homotrp(Boc)-OH ≥97.0% (HPLC) C25H28N2O6