Synthesis and Consecutive Double Diels–Alder Cycloadditions of 3-Methylene-5-phenylsulfinyl-1-pentene as a Synthetic Equivalent of Parent Cross-conjugated Triene, 3-Methylene-1,4-pentadiene
3-Methylene-5-phenylsulfinyl-1-pentene undergoes stepwise double Diels–Alder cycloadditions with two different dienophiles to afford hydronaphthalene skeletons. This sequence corresponds to cross type of diene-transmissive Diels-Alder cycloaddition of parent 3-methylene-1,4-pentadiene.
Highly Functionalized, Angularly Anellated Aromatic Compounds from Dendralenes
作者:Henning Hopf、Şeref Yildizhan
DOI:10.1002/ejoc.201001536
日期:2011.4
[3]Dendralene (2) has been converted into the benz[a]anthracene tetraester 13 in a protocol involving diene-transmissive Diels–Alder addition of dimethyl acetylenedicarboxylate to 2 followed by a sequence of reduction–addition–aromatization reactions. Likewise, the next higher vinylog [4]dendralene (19) provided the phenanthrene hexaester 21. An attempt to prepare the double o-xylylene intermediate