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2000 protection, deprotection protection, deprotection O 0345 47 - 078 Selective Deprotection of Acetals with Me 3 SiCH 2 MgCl. Peterson- Type Olefination of Acetals. The acetal functionality of a contiguous diol can be regioselectively deprotected by use of excess silylmethyl Grignard reagent (IV). In addition, acetals (XIII) as well as ketal (XV) are olefinated by this reagent in the presence of ZnI 2 . — (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) 1

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

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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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