A MILD AND FEASIBLE DEPROTECTION OF ALCOHOL TETRAHYDROPYRANYL OR METHOXYMETHYL ETHERS CATALYZED BY Sc(OTf)3
摘要:
Tetrahydropyranyl or methoxymethyl ethers can be easily deprotected by treatment of-a catalytic amount of scandium trifluoromethanesulfonate along with methanol or 1,3-propanediol, respectively, to afford the corresponding parent alcohols in high to excellent yields.
A One-Step Conversion of<i>p</i>-Methoxybenzyl Ethers into Methoxymethyl Ethers by the Action of Dimethoxymethane in the Presence of Tin(II) Bromide and Bromomethyl Methyl Ether
作者:Takeshi Oriyama、Mikio Kimura、Gen Koga
DOI:10.1246/bcsj.67.885
日期:1994.3
The combined use of dimethoxymethane with catalytic amounts of tin(II) bromide and bromomethyl methyl ether cleaves p-methoxybenzyl ethers to give methoxymethyl ethers in good yields. The chemoselective conversion of p-methoxybenzyl ethers in the presence of the benzyl ether function into methoxymethyl ethers has also occurred successfully.
二甲氧基甲烷与催化量的溴化锡 (II) 和溴甲基甲基醚的组合使用可裂解对甲氧基苄基醚,以良好的产率得到甲氧基甲基醚。在苄基醚官能团存在下对甲氧基苄基醚化学选择性转化为甲氧基甲基醚也已成功发生。
Methoxymethylation of Alcohols, Phenols, and Avermectin Aglycones Using MOM-2-pyridylsulfide
作者:Benjamin F. Marcune、Sandor Karady、Ulf-H. Dolling、Thomas J. Novak
DOI:10.1021/jo9822582
日期:1999.4.1
Methoxymethyl-2-pyridylsulfide (MOM-ON) is an effective methoxymethylating reagent when used in conjunction with AgOTf, NaOAc, and THF. A wide range of MOM ethers are produced from corresponding phenols and alcohols, including tertiary and allylic alcohols, in good yields and under mild, neutral conditions. This method is also effective for the methoxymethylation of avermectin aglycones.
Tetrahydropyranyl or methoxymethyl ethers can be easily deprotected by treatment of-a catalytic amount of scandium trifluoromethanesulfonate along with methanol or 1,3-propanediol, respectively, to afford the corresponding parent alcohols in high to excellent yields.