A new synthesis of alkaloid (<i>S</i>)-3-hydroxypiperidin-2-one and its<i>O</i>-TBS protected derivative
作者:Pei-Qiang Huang、Guo Chen、Xiao Zheng
DOI:10.1002/jhet.5570440239
日期:2007.3
From the known lactone (S)-4, easily derived from L-glutamic acid, a scalable approach to chiral building block O-silylated 3-hydroxypiperidin-2-one 3 and alkaloid 1 was achieved in five and six-steps respectively. The key steps are a chemoselective amidation of lactone-ester 5 and a one-pot reductive borane-decomplexation, N-debenzylation and cyclization.
Hunter; Woodward, Biochemical Journal, 1941, vol. 35, p. 1300
作者:Hunter、Woodward
DOI:——
日期:——
Enantioselective synthesis of 3-hydroxypiperidin-2-ones
作者:Gary Gibbs、Martin J. Hateley、Lee McLaren、Matthew Welham、Christine L. Willis
DOI:10.1016/s0040-4039(99)80114-2
日期:1999.1
An efficient synthesis of (S)- and (R)-3-hydroxypiperidin-2-ones from methyl 5-nitro-2-oxopentanoate is described. A one-pot enzyme catalysed hydrolysis of the ester and reduction of the ketone gave enantiopure 2-hydroxy-5-nitropentanoic acids which on esterification, catalytichydrogenationover a platinum(IV) oxide catalyst and intramolecular cyclisation gave the target compounds in 93% overall yield
Novel aminoglycoside derivatives and their salts containing 2-deoxystreptamine moiety, of which the 1-amino group is modified with a group represented by the formula: ##STR1## (wherein R is hydrogen or C.sub.1 to C.sub.6 alkanoyl; and n is an integer of 1 to 3.) effective in treatment and prevention of infectious diseases caused by gram-positive and gram-negative bacteria.