A Mild Heteroatom (O-, N-, and S-) Methylation Protocol Using Trimethyl Phosphate (TMP)–Ca(OH)2Combination
作者:Yu Tang、Biao Yu
DOI:10.1055/a-1731-3852
日期:2022.5
A mild heteroatom methylation protocol using trimethyl phosphate (TMP)–Ca(OH)2 combination has been developed, which proceeds in DMF, or water, or under neat conditions, at 80 °C or at room temperature. A series of O-, N-, and S-nucleophiles, including phenols, sulfonamides, N-heterocycles, such as 9H-carbazole, indole derivatives, and 1,8-naphthalimide, and aryl/alkyl thiols, are suitable substrates
已开发出使用磷酸三甲酯 (TMP)-Ca(OH) 2组合的温和杂原子甲基化方案,该方案在 DMF 或水中,或在纯净条件下,在 80 °C 或室温下进行。一系列O-、N-和S-亲核试剂,包括苯酚、磺酰胺、N-杂环,例如 9 H-咔唑、吲哚衍生物和 1,8-萘酰亚胺,以及芳基/烷基硫醇,是这个协议。该协议的高效、操作简单、可扩展性、成本效益和环保性质使其成为传统碱基促进杂原子甲基化程序的有吸引力的替代方案。