Alkylation and arylation of 2-trimethylsiloxyallyl halides with lithium dialkyl- and diarylcuprate, respectively, gave silylenolethers in a regiospecific manner.
Conjugate addition of allylic groups to α,β-unsaturated carbonyl compounds via (η3-allyl)Fe(CO)2NO complexes
作者:Keiji Itoh、Saburo Nakanishi、Yoshio Otsuji
DOI:10.1016/0022-328x(94)80122-3
日期:1994.6
complexes undergo conjugateaddition to α,β-unsaturatedcarbonylcompounds to give the corresponding δ,ϵ-unsaturated carbonylcompounds in good yields. The reaction of (η3-1-or 2-trimethylsiloxyallyl) Fe(CO)2NO complexes with α,β-unsaturated ketones affords 1,6- or 1,5-diketones, respectively. (η3-1-Acetonylallyl)Fe(CO)2NO complexes also react with α,β-unsaturatedcarbonylcompounds to give 1,8-dicarbonyl
2-dimethylaminomethyl-3-trimethylsilylmethyl-1,3-butadiene as 2,2′-biallyl diradical synthon. A new and facile entry to 1,2-dimethylenecyclohexanes, and [6.6] and (6.7] ring systems
作者:Akira Hosomi、Ken Otaka、Hideki Sakurai
DOI:10.1016/s0040-4039(00)84669-9
日期:1986.1
compound, prepared readily by the cross-coupling reaction of β-bromoallyltrimethylsilane and the Grignard reagent from β-bromoallyldimethylamine, is an effective reagent as 2,2′-biallyl diradical synthon to give [6.6] and [6.7] ringsystems by tandem cycloaddition reactions. 1,2-Dimethylenecyclohexanes can also be isolated in good yield.