ChemInform Abstract: Selective Deprotection of Acetals with Me3SiCH2MgCl. Peterson-Type Olefination...

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2000 protection, deprotection

protection, deprotectionO 0345

47 - 078Selective Deprotection of Acetals with Me3SiCH2MgCl. Peterson-Type Olefination of Acetals. — The acetal functionality of a contiguousdiol can be regioselectively deprotected by use of excess silylmethyl Grignardreagent (IV). In addition, acetals (XIII) as well as ketal (XV) are olefinatedby this reagent in the presence of ZnI2. — (CHIANG, CHAO-CHENG;CHEN, YU-HUEI; HSIEH, YU-TSAI; LUH, TIEN-YAU; J. Org. Chem. 65(2000) 15, 4694-4697; Dep. Chem., Natl. Taiwan Univ., Taipei 106, Taiwan; EN)

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