Chemoenzymatic synthesis of enantiomerically pure terminal 1,2-diols
作者:Ahmed Kamal、Mahendra Sandbhor、Kaleem Ahmed、S.F. Adil、Ahmad Ali Shaik
DOI:10.1016/j.tetasy.2003.09.035
日期:2003.12
A new practical method for the enzymatic synthesis of 1,2-diols has been developed by employing a lipase catalyzed one-pot transesterification protocol. A series of substituted α-acetoxyphenylethanones 3a–g have been reduced to the corresponding alcohols under mild conditions employing sodium borohydride and moist neutral alumina, and further subjected for lipase catalyzed irreversible transesterification
Hypervalent-iodine-mediated oxidation followed by the acetoxylation/tosylation of α-substituted benzylamines to obtain α-acyloxy/tosyloxy ketones
作者:Bapurao D. Rupanawar、Kishor D. Mane、Gurunath Suryavanshi
DOI:10.1039/d2nj02271k
日期:——
An efficient and metal-free method has been developed for the sequential oxidation of α-alkylbenzylamines followed by acetoxylation or tosylation for the synthesis of α-acyloxy/tosyloxy ketones using hypervalent iodine(III). The employment of a simple starting material, broad substrate scope and operational simplicity are the key features of this protocol.
已经开发了一种高效且无金属的方法,用于顺序氧化 α-烷基苄胺,然后使用高价碘 ( III ) 进行乙酰氧基化或甲苯磺酰化合成 α-酰氧基/甲苯磺酰氧基酮。使用简单的起始材料、广泛的底物范围和操作简单是该协议的主要特点。
Stereochemistry of the ring opening of chiral epoxides derived from allylic alcohols having two substituted phenyl groups