Efficient and/or selective methylation by diazomethane of alcohols, halo alcohols, glycols, amino alcohols and mercapto alcohols with the use of a proton??exchanged …

H Takeuchi, H Kishioka…

Index: Takeuchi, Hiroshi; Kishioka, Hiroaki; Kitajima, Kunio Journal of Physical Organic Chemistry, 1995 , vol. 8, # 2 p. 121 - 126

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Citation Number: 7

Abstract

Abstract Reactions of diazomethane with butanol, allyl alcohol and β-and γ-halo alcohols led to efficient methylation (giving the corresponding methyl ethers) with the use of a proton- exchanged X-type zeolite compared with H 2 SO 4. The reactions with propylene and isobutylene glycols using the zeolite provided regioselective methylation of the primary OH rather than the secondary or tertiary OH, whereas regioselectivity was not observed in the ...

~7%

~23%

~3%

~60%

~80%

~54%

~13%

~31%

~45%

~78%

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