Tandem cross metathesis and intramolecular aza-Michael reaction to synthesize bicyclic piperidines and indolizidine 167E
作者:Shang-Shing P. Chou、Jhih-Liang Huang
DOI:10.1016/j.tetlet.2012.08.031
日期:2012.10
We have successfully transformed the terminal alkenes of dihydropyridones to the alpha,beta-unsaturated esters by cross metathesis (CM). After detosylation the secondary amides can undergo the intramolecular aza-Michael reaction to give the bicyclic piperidine structures. The stereoselectivity of the aza-Michael reaction is determined by the size of the newly formed ring. With simple transformations we have also achieved the synthesis of indolizidine 167E. (C) 2012 Elsevier Ltd. All rights reserved.
CHOU, SHANG-SHING P.;WEY, SHIOW-JYI, J. ORG. CHEM., 55,(1990) N, C. 1270-1274
作者:CHOU, SHANG-SHING P.、WEY, SHIOW-JYI
DOI:——
日期:——
Intramolecular Diels-Alder reactions of sulfur-substituted dienes via 3-sulfolenes