Silicon-DirectedNazarov Cyclizations. Part V. Substituent and heteroatom effects on the reaction
作者:Scott E. Denmark、Karl L. Habermas、Gary A. Hite
DOI:10.1002/hlca.19880710120
日期:1988.2.3
The ability to incorporate alkyl, alkenyl, aryl, and heteroatomic groups into substrates for the silicon-directed Nazarov cyclization and their subsequent reactions has been investigated. In general, most of the groups are compatible with the conditions for the cyclization and do not interfere even when directly attached to the divinyl ketone. The influence of substituents on the rate of the cyclization
已经研究了将烷基,烯基,芳基和杂原子基团掺入底物中以进行硅定向的Nazarov环化反应及其后续反应的能力。通常,大多数基团与环化条件相容,即使直接连接到二乙烯基酮上也不会干扰。已经解决了取代基对环化速率的影响,并与简单的机理图相一致。除了与二乙烯基酮的α-乙烯基C原子连接外,还可以容忍含O和N的功能。讨论了稠合环丁烷的非对映体定向作用。