A facile access to masked isobenzofurans ; High exo-stereoselectivity in the Diels-Alder reactions of 4,7-dihydro-4,7-ethanoisobenzofuran.
作者:Dominique Stephan、Alain Gorgues、André Le Coq
DOI:10.1016/s0040-4039(00)94257-6
日期:——
The isobenzofuran derivatives precursors a-c are readily prepared from ; their Diels-Alder adducts with cis-dienophiles present a stereochemistry endoexo from b,c and, interestingly, only exo (towards the furan moiety) from a.
异苯并呋喃衍生物的前体ac可以容易地由以下方法制备:他们的Diels-Alder与顺式亲二烯体的加合物呈现b,c立体化学内切,有趣的是,仅来自a的exo(向呋喃部分)。