Photochemical reactivity of keto amidines. Type I rearrangement to aminocyclopropyl isocyanates and photochemical generation of bisisocyanates from bichromophoric systems
2-Aminopyrrolin 5-ones and aminocyclopropyl isocyanates therefrom
申请人:University Patents, Inc.
公开号:US04380647A1
公开(公告)日:1983-04-19
Subjecting 1,4-bis-[(pyrrolin-3-onyl)methylamino]-2-butyne to ultraviolet irradiation effects rearrangement in greater than 80% yield to 1,4-bis-[(isocyanatocycloprolpyl)methylamino]-2-butyne. The diisocyanate is useful in the synthesis of polyurethanes and polyureas and also for the in situ photochemical generation of a cross-linking agent for polyurethanes and structurally related polymers.