WADA, EIJI;KANEMASA, SHUJI;TSUGE, OTOHIKO, BULL. CHEM. SOC. JAP., 62,(1989) N, C. 1198-1204
作者:WADA, EIJI、KANEMASA, SHUJI、TSUGE, OTOHIKO
DOI:——
日期:——
Diene-Transmissive Hetero Diels–Alder Reactions of 3-Oxo-1,4-pentadiene Equivalents Leading to Functionalized 2-Chromanones
作者:Eiji Wada、Shuji Kanemasa、Otohiko Tsuge
DOI:10.1246/bcsj.62.1198
日期:1989.4.15
Through hetero Diels–Alder reaction with a vinyl ether and Horner–Emmons olefination, diethyl 2-oxo-3-butenylphosphonate leads to 2-ethoxy-6-(1-alkenyl)-3,4-dihydro-2H-pyrans which are further transformed into 2-chromanones via regioselective Diels–Alder reactions with activated acetylenes followed by hydrolysis and oxidation.