1、2007 M 26 5 CHEMICAL INDUSTRY AND ENGINEERING PROGRESS 668 Zs e 3/ Z .b=&J=J JsQ J.b 2005 2611 987& 992. 39 Yagii T Itokazu T Murata K(Daicel). Process for preparation of isocyanate compounds US 5773643P. 1998. 40 Deleon R Akane K Yanauchi T et al. Catalytic methoxycarbonylation of 1, 6& hexanediami
2、ne with dimethyl carbonate to dimethylhexane&1 6& dicarbamate using Bi(NO3)3J.Appl.Catal.A General 2002225 43& 49. 41 Romano U Fornasari G Gioacchino S D. Preparation of aromatic urethanes GB 2091730P. 1982. 42 + . B=s e 3 #/ Z J. p 2005 3512 35& 40 Lim S C. Aliphatic diisocyanates processes/PEP SRI Consulting 2002.
