3-Substituted Cyclopenta[c]pyrans: Synthesis and Electrophilic Substitutions
作者:Eduard Güllük、Elena Bogdan、Manfred Christl
DOI:10.1002/ejoc.200500631
日期:2006.1
The literature procedure for the preparation of the parent cyclopenta[c]pyran (1) was shown to provide only a low yield on mechanistic grounds. Intended as an alternative starting material for the synthesis of 1, the cyclopenta[c]pyran-3-ones 10 were prepared. However, their conversion into 1 could be achieved at best in 1 % yield. Derivatives of 1 with an oxygen functionality in the 3-position were