CJCU
Studies on Organophosphorus Heterocycles (Ⅷ)─Cyclization of Lawesson's Reagent with the Bifunctional Substrates Containing Two Amino Groups
HE Liang-Nian, CHEN Ru-Yu, ZHOU Ren-Xi
Chem. J. Chinese Universities . 1997, (12): 1969 -1973 .