Platinum-Catalyzed Addition of Dimethylsilylene to β-Methyl α,β-Unsaturated Ketones: γ-Silylation Forming 1-Oxa-2-silacyclohex-5-enes
摘要:
The reaction of beta-methyl alpha,beta-unsaturated ketones with pentamethyldisi lane in the presence of a platinum catalyst brought about silylation on the beta-methyl group giving high yields of oxasilacyclohexenes.
Platinum-Catalyzed Addition of Dimethylsilylene to β-Methyl α,β-Unsaturated Ketones: γ-Silylation Forming 1-Oxa-2-silacyclohex-5-enes
摘要:
The reaction of beta-methyl alpha,beta-unsaturated ketones with pentamethyldisi lane in the presence of a platinum catalyst brought about silylation on the beta-methyl group giving high yields of oxasilacyclohexenes.
Asymmetric Michael reactions and enantioselective protonations between enones and thiols were catalyzed by a Sc(OTf)3–chiral 2,2′-bipyridine complex in water. The remarkable governing of the enantioselectivity for simple introduction of protons despite their abnormally high mobility in water may provide us with new synthetic opportunities as well as significant chemical advances.