New synthesis and reactions of indolizidine 167E and indolizidine derivatives
摘要:
Two new methods of synthesizing indolizidines via ring-closing metathesis (RCM) have been developed. One method utilizes an alkene-isomerization, and the other method uses N-vinylation of an amide as the key step. Indolizidine 167E and many derivatives have also been synthesized. (C) 2012 Elsevier Ltd. All rights reserved.
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.
New synthesis and reactions of indolizidine 167E and indolizidine derivatives
作者:Shang-Shing P. Chou、Shan-Lun Chiang、Guan-Lin Huang、Bi-Shan Chiang、Ya-Chien Yu
DOI:10.1016/j.tet.2012.10.026
日期:2013.1
Two new methods of synthesizing indolizidines via ring-closing metathesis (RCM) have been developed. One method utilizes an alkene-isomerization, and the other method uses N-vinylation of an amide as the key step. Indolizidine 167E and many derivatives have also been synthesized. (C) 2012 Elsevier Ltd. All rights reserved.