+++Thanks_suprachemister_1 article from Tet lett

[pendyala123]

A highly efficient and general N-monomethylation of functionalized primary amines via formylation--borane:methyl sulfide reduction

Tetrahedron Letters (1982), 23, (33), 3315-18
S. Krishnamurthy

DOI:

http://dx.doi.org/10.1016/S0040-4039(00)87603-0

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http://www.sciencedirect.com/science/article/pii/S0040403900876030

[suprachemister]

here

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http://lib.gen.in/next/MTAuMTAxNi9zMDA0MC00MDM5KDAwKTg3NjAzLTA=/krishnamurthy1982.pdf