Regioselective [3+3] Cyclization of 1,3-Bis(silyloxy)buta-1,3-dienes with 1,1,1-Trifluoro-4-(silyloxy)alk-3-en-2-ones: New and Convenient Synthesis of Functionalized 5-Alkyl-3-(trifluoromethyl)phenols
作者:Stefan Büttner、Alina Bunescu、Sebastian Reimann、T. H. Tam Dang、Thomas Pundt、Renske Klassen、Andreas Schmidt、Nazken K. Kelzhanova、Zharylkasyn A. Abilov、Tariel V. Ghochikyan、Ashot S. Saghiyan、Alexander Villinger、Helmut Reinke、Anke Spannenberg、Peter Langer
DOI:10.1002/hlca.201200056
日期:2013.1
Functionalized 5‐alkyl‐3‐(trifluoromethyl)phenols were prepared by formal [3+3] cyclization of 1,3‐bis(silyloxy)buta‐1,3‐dienes with 1,1,1‐trifluoro‐4‐(silyloxy)alk‐3‐en‐2‐ones derived from 1,1,1‐trifluoroalkane‐2,4‐diones. The latter were prepared by condensation of the dianion of 1,1,1‐trifluoropentane‐2,4‐dione with alkyl halides.
功能化的5-烷基-3-(三氟甲基)酚是通过将1,3-双(甲硅烷氧基)丁烯-1,3-二烯与1,1,1-三氟-4-(甲硅烷氧基)进行正式的[3 + 3]环化而制备的)由1,1,1-三氟烷烃-2,4-二酮衍生而来的alk-3-en-2-one。后者是通过1,1,1-三氟戊烷-2,4-二酮的二价阴离子与烷基卤的缩合制备的。