Helena Zahradnícková et al.
Journal of separation science, 29(2), 236-241 (2006-03-10)
For the first time, headspace solid-phase microextraction coupled with GC-MS analysis was used to study volatile compounds emitted by the tick Ixodes ricinus (L.). Variables such as the type of SPME fibre, equilibration time and extraction time have been evaluated...
Panagiotis Stathopoulos et al.
Journal of peptide science : an official publication of the European Peptide Society, 12(3), 227-232 (2005-08-17)
Decomposition of the resin linkers during TFA cleavage of the peptides in the Fmoc strategy leads to alkylation of sensitive amino acids. The C-terminal amide alkylation, reported for the first time, is shown to be a major problem in peptide...
Takashi Iijima et al.
Bioscience, biotechnology, and biochemistry, 73(11), 2547-2548 (2009-11-10)
An efficient synthesis of tri-O-methylated resveratrol is presented using an advanced Heck reaction promoted by Pd(dba)(2) in the presence of P(t-Bu)(3).
Hiromitsu Takayama et al.
Chemical & pharmaceutical bulletin, 50(7), 960-963 (2002-07-20)
Lead tetraacetate oxidation of a Corynanthe-type indole alkaloid, mitragynine, produced mainly 7-acetoxyindolenine derivative (2) together with a dimeric compound (4) as a minor product. The novel structure having a bridge between the C-11' and C-7 positions in the respective indolenine...
Martin A Fascione et al.
Carbohydrate research, 348, 6-13 (2011-12-28)
Novel oxathiane spiroketal donors have been synthesised and activated via an umpolung S-arylation strategy using 1,3,5-trimethoxybenzene and 1,3-dimethoxybenzene. The comparative reactivity of the resulting 2,4,6-trimethoxyphenyl (TMP)- and 2,4-dimethoxyphenyl (DMP)-oxathiane spiroketal sulfonium ions is discussed, and their α-stereoselectivity in glycosylation reactions...