A concise and stereoselective synthesis of (+)- and (−)-deoxoprosophylline
作者:Subhash P. Chavan、Cherukupally Praveen
DOI:10.1016/j.tetlet.2003.10.142
日期:2004.1
An efficient synthesis of (+)- and (−)-deoxoprosophylline was accomplished from the readily available cis-2-butene-1,4-diol in which the Sharpless asymmetric dihydroxylation was used as the key step.
A novel, concise and efficient protocol for non-natural piperidine compounds
作者:Subhash P. Chavan、Nilesh B. Dumare、Kailash P. Pawar
DOI:10.1039/c4ra04558k
日期:——
Formal synthesis of L-altro-1-deoxynojirimycin, cis-3-hydroxypipecolic acid along with synthesis of (R)-piperidinol and a conceptually different advanced intermediate for non-natural piperidine alkaloids is reported from cis-butene-1,4-diol. The key reactions involved are Johnson–Claisenrearrangement, Sharpless asymmetricdihydroxylation, reductive lactamization and novel regioselective elimination
An efficient stereoselective synthesis of (2S,4S,5R)-(−)- and (2R,4R,5S)-(+)-bulgecinine
作者:Subhash P. Chavan、Cherukupally Praveen、Pallavi Sharma、U.R. Kalkote
DOI:10.1016/j.tetlet.2004.11.101
日期:2005.1
A short synthetic route to (−)-and (+)-bulgecinine, the amino acid moiety of the bulgecins was achieved from the readily available nonchiral pool starting material cis-2-butene-1,4-diol in which a Claisen orthoester rearrangement and a Sharpless asymmetric dihydroxylation were used as the key steps.
A highly convergent and efficient synthesis of (-)-microcarpalide, a 10-membered lactone displaying remarkable microfilament disrupting activity is described. Ring-closing metathesis and Sharpless asymmetric dihydroxylations are the key steps. Our strategy highlights the application of novel hydroxy lactone precursors for the stereoselective synthesis of (-)-microcarpalide. (C) 2005 Elsevier Ltd. All rights reserved.
Microcarpalide is a strong microfilament disrupting agent. The convergent and stereoselective synthesis of microcarpalide was succeeded via Julia olefination and macrolactonization. (c) 2005 Elsevier Ltd. All rights reserved.