A. Miyashita et al., ELECTROPHILIC CYANATIONS .1. SYNTHESIS OF THIOCYANATOHETEROARENES ANDTOSYLHETEROARENES FROM MERCAPTOHETEROARENES USING P-TOLUENESULFONYL CYANIDE, Heterocycles, 45(4), 1997, pp. 745-755
Mercaptoheteroarenes (1) underwent electrophilic cyanation with p-tolu
enesulfonyl cyanide (TsCN) in THF in the presence of NaH to give the c
orresponding thiocyanatoheteroarenes (2) in moderate to good yields. I
n DMF, tosylheteroarenes (4) were formed by substitution with p-toluen
esulfinate ion through thiocyanatoheteroarenes (2).