A versatilechiron approach to the tetrahydropyranyl diarylheptanoid natural products (-)-centrolobine and (+)-centrolobine has been described. The use of an aldol reaction followed by reductive etherification for the formation of tetrahydropyran ring is of importance. diarylheptanoid - tetrahydropyran - centrolobine - aldol reaction - reductive etherification
Reductive Cyclizations of Hydroxysulfinyl Ketones: Enantioselective Access to Tetrahydropyran and Tetrahydrofuran Derivatives
作者:M. Carmen Carreño、Renaud Des Mazery、Antonio Urbano、Françoise Colobert、Guy Solladié
DOI:10.1021/jo034817x
日期:2003.10.1
The stereocontrolled formation of cis-2,5-disubstitutedtetrahydrofurans and cis-2,6-disubstituted tetrahydropyrans is achieved from enantiopure ketosulfinyl esters by reduction, Weinreb's amide, and ketone formation, followed by the reductive cyclization (Et3SiH/TMSOTf) of the resulting hydroxysulfinyl ketones. The sulfoxide-bearing heterocycles were transformed into two natural products, (-)-centrolobine
Stereoselective Formal Total Synthesis of Novel Antibiotic (-)-Centrolobine
作者:Debendra K. Mohapatra、Rita Pal、Hasibur Rahaman、Mukund K. Gurjar
DOI:10.3987/com-08-s(s)1
日期:——
A concise and stereoselective formaltotalsynthesis of (-)-centrolobine is achieved utilizing Mioskowski's Lewis acid mediated epoxide opening followed by ring-closing metathesis as the key reaction.
利用 Mioskowski 的 Lewis 酸介导的环氧化物开环和闭环复分解作为关键反应,实现了 (-)-centrolobine 的简明和立体选择性形式全合成。