Tetrahedron

New facile alkoxycarbonylating agent, alkyl pyrazole-1-carboxylates. The preparation and the utilities

C Kashima, S Tsuruoka, S Mizuhara

Index: Kashima, Choji; Tsuruoka, Shiro; Mizuhara, Saori Tetrahedron, 1998 , vol. 54, # 49 p. 14679 - 14688

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Citation Number: 12

Abstract

Alkyl pyrazole-1-carboxylates (2), which were readily prepared from alkyl chloroformate or carbazate in good yields, were provided as the new facile alkoxycarbonylating agents toward the Grignard reagents for the synthesis of one carbon higher carboxylic esters. Also amines were alkoxycarbonylated by 2 to produce the corresponding urethanes even in an aqueous medium. Benzyl 3, 5-dimethylpyrazole-1-carboxylate (2d) could be utilized for ...

~5%

~85%

~65%

~76%

~86%

~56%

~86%

~96%

~58%

~9%

~52%

~41%

~62%

~74%

~26%

~91%

~70%

~46%

~39%

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