Abstract
The N-methylation of primary carboxamides is based on two consecutive reactions. The silylation of the corresponding carboxamides with chloro(chloromethyl)dimethylsilane in the presence of an organic base is accompanied by intramolecular rearrangement with the formation of the (O—Si) chelate compound of pentacoordinated silicon containing a C(O)—N—C—Si fragment. The subsequent desilylation with metal fluorides in ethylene glycol allows obtaining the corresponding N-methyl carboxamides in 58–92% yields.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 735–739, April, 2022.
The results of this work were obtained using analytical equipment of the Baikal Center for Collective use of the Siberian Branch of the Russian Academy of Sciences.
No human or animal subjects were used in this research.
The authors declare no competing interests.
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Lazareva, N.F., Lazarev, I.M. Tandem silylation—desilylation reaction in the synthesis of N-methyl carboxamides. Russ Chem Bull 71, 735–739 (2022). https://doi.org/10.1007/s11172-022-3473-7
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DOI: https://doi.org/10.1007/s11172-022-3473-7