Counterattack Mode Differential Acetylative Deprotection of Phenylmethyl Ethers: Applications to Solid Phase Organic Reactions
摘要:
A counterattack protocol for differential acetylative cleavage of phenylmethyl ether has been developed. The phenylmethyl moiety is liberated as benzyl bromide that is isolated and reused providing advantages in terms of waste minimization/utilization and atom economy. The applicability of this methodology has been extended for solid phase organic reactions with the feasibility of reuse of the solid support.
Direct Conversion of Aryl Silyl Ethers to Alkyl Aryl and Diaryl Ethers
作者:D. G. Saunders
DOI:10.1055/s-1988-27579
日期:——
The reaction of aryl silyl ethers with alkyl halide, or activated aryl halide, and tetrabutylammonium fluoride, yields alkyl aryl ethers or diaryl ethers, respectively. Alkyl silyl ethers under the same or related reaction conditions give mainly the corresponding alcohol, and only very low yields of the ether.
Counterattack Mode Differential Acetylative Deprotection of Phenylmethyl Ethers: Applications to Solid Phase Organic Reactions
作者:Asit K. Chakraborti、Sunay V. Chankeshwara
DOI:10.1021/jo801659g
日期:2009.2.6
A counterattack protocol for differential acetylative cleavage of phenylmethyl ether has been developed. The phenylmethyl moiety is liberated as benzyl bromide that is isolated and reused providing advantages in terms of waste minimization/utilization and atom economy. The applicability of this methodology has been extended for solid phase organic reactions with the feasibility of reuse of the solid support.
Pd-Catalyzed Debenzylation and Deallylation of Ethers and Esters with Sodium Hydride
作者:Yujian Mao、Ye Liu、Yanwei Hu、Liang Wang、Shilei Zhang、Wei Wang
DOI:10.1021/acscatal.8b00185
日期:2018.4.6
simply that the addition of Pd(OAc)2 as a promotor switches the reactivity of a commonly used base NaH to a nucleophilic reductant. The reactivity is engineered into a palladium-catalyzed reductive debenzylation and deallylation of aryl ethers and esters. This operationally simple, mild protocol displays a broad substrate scope and a broad spectrum of functional group tolerance (>50 examples) and high chemoselectivity