‘One-flask’ transformation of isocyanates and isothiocyanates to guanidines hydrochloride by using sodium bis(trimethylsilyl)amide
作者:Chun-Yen Chen、Hui-Chang Lin、Yu-Ying Huang、Kun-Lung Chen、Jiann-Jyh Huang、Mou-Yung Yeh、Fung Fuh Wong
DOI:10.1016/j.tet.2010.01.003
日期:2010.3
A ‘one-flask’ synthesis of guanidines was developed by reacting isocyanates and isothiocyanates with sodium bis(trimethylsilyl)amide followed by addition of primary or secondary amines with a catalytic amount of AlCl3. The desired guanidines were obtained in good yields and the reaction was applicable to aliphatic and aromatic substrates. A plausible mechanism was proposed through the generation of