133565-44-3Relevant articles and documents
A Total Synthesis of AI-77-B
Ward, Richard A.,Procter, Garry
, p. 3359 - 3362 (1992)
A short total synthesis of AI-77-B (1) is reported, which produces the natural enantiomer using S-leucine and S-aspartic acid as the optically active starting materials. Key words: Natural product; AI-77-B; gastroprotective; total synthesis; enantioselect
Asymmetric michael addition of malonates to enones catalyzed by a primary Β-amino acid and its lithium salt
Yoshida, Masanori,Narita, Mao,Hara, Shoji
, p. 8513 - 8517 (2011/12/03)
Highly enantioselective Michael addition of malonates to enones was achieved using a mixed catalyst consisting of a primary Β-amino acid, O-TBDPS (S)-Β-homoserine, and its lithium salt. Various cyclic and acyclic enones were converted into 1,5-ketoesters in high yields (up to 92%) with high enantioselectivity (up to 97% ee) under mild reaction conditions. Details of synthesis of the catalyst, optimization of the reaction conditions for the Michael addition reaction, and a plausible reaction mechanism are described.
Synthesis of N-urethane protected β-amino alcohols employing N-(protected-α-aminoacyl)benzotriazoles
Sureshbabu, Vommina V.,Sudarshan,Muralidhar,Narendra
, p. 683 - 685 (2008/09/20)
A simple and racemisation-free synthesis of N-urethane protected α-amino/peptidyl alcohols by the reduction of the corresponding easily accessible N-acylbenzotriazoles is described. The method is practical, straightforward, fast and efficient for the synt