Asymmetric synthesis of cis-hydrindanediones by diels-aider reaction of cyclopentenones bearing a 3-sulfonyl-1,3-oxazolidine ring as chiral auxilliary
作者:Holger Hoffmann、Michael Bolte、Bernd Berger、Dieter Hoppe
DOI:10.1016/0040-4039(93)88098-4
日期:1993.10
The Diels-Alder reaction of enantiomerically pure 2- and 5-(1,3-oxazolidin-2-yl)-2-cyclopentenones 8 or 14 and 2-(trimethylsilyloxy)-1,3-butadiene 9 under Lewis-acid catalysis yields (after hydrolysis) protected 3,7-dioxohydrindane-carbaldehydes 11 or 16, respectively.
对映体纯的2-和5-(1,3-恶唑烷基-2-基)-2-环戊烯酮8或14与2-(三甲基甲硅烷氧基)-1,3-丁二烯9的Diels-Alder反应在路易斯酸催化下产生(水解后)分别保护3,7-二氧代氢茚基-甲醛11或16。