| 摘要 |
1,235,156. Isocyanates. V. P. KOZJUKOV, V. F. MIRONOV, and V. D. SHELUDYAKOV. 26 April, 1968 [26 April, 1967; 16 June, 1967], No. 19871/68. Heading C2C. [Also in Division C3] Organic isocyanates are prepared by phosgenating N-silyl-substituted primary amines at a temperature of from - 80� to 250� C. The products have the general formula R(NCO)a, where R is an alkyl, alkenyl, alkinyl, aryl, alkaryl, or aralkyl group which may be unsubstituted or may contain elements of Groups IV to VII. Examples 1, 2 and 3 describe the preparation of methyl isocyanate from N- methylaminotrimethyl silane, bis-(trimethylsilyl) methylamine and a mixture of silazanes respectively. The preparations of isobutyl, allyl and phenyl isocyanates are also described. |
