Diastereoselective Synthesis of 4-Sila-3,4,4a,5-tetrahydro-2H-isoquinolin-1-ones through Intramolecular Diels-Alder Reaction of Chiral Silatrienes
作者:Paulo J. Coelho、Luis Blanco
DOI:10.1055/s-2001-16784
日期:——
thyl)methylsilane. The thermal inverse electron demand intra-mo- lecular Diels-Alderreaction of these compounds gave 4-sila- 3,4,4a,5-tetrahydro-2H-isoquinolin-1-ones. Moderate diastereo- selectivity was observed for a silatriene bearing a methyl and a cyclohexyl substituent on the chiral silicon atom. The intermediate tricyclic adduct of this reaction was also isolated.
Highly diastereoselective intramolecular Diels–Alder reaction of chiral silatrienes
作者:Paulo J Coelho、Luis Blanco
DOI:10.1016/s0040-4020(03)00261-8
日期:2003.3
2-silahexa-3,5-dienyl acrylates were prepared in six steps from dichloro(chloromethyl)methylsilane. The EtAlCl2 catalysed intramolecular Diels–Alderreaction of these compounds gave chiral 4-sila-4a,7,8,8a-tetrahydroisochroman-1-ones in good yield. Very good diastereoselectivity was observed for a silatriene bearing a methyl and a 2-methoxyphenyl substituent on the chiral silicon atom.