Photochemical rearrangement of 2-aminopyrrolin-5-ones to aminocy

Details Photochemical rearrangement of 2-aminopyrrolin-5-ones to aminocy Photochemical rearrangement of 2-aminopyrrolin-5-ones to aminocy

1982-09-22

1985-03-19

Chan, Nicky

Chemistry: electrical and wave energy

Processes and products

Processes of treating materials by wave energy

204158R, 260453P, C08G 1880, C07C11800

Patent

active

045057923

ABSTRACT:
Subjecting 1,4-bis-[(pyrrolin-3-onyl)methylamino]-2-butyne to ultraviolet irradiation effects rearrangement in greater than 80% yield to 1,4-bis-[(isocyanatocyclopropyl)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.

REFERENCES:
Comstock et al., Am. Chem. J., vol. 13, 522, (1891).
Nagasaka et al., Heterocycles, vol. 9, No. 10, 1375-1380, (1978).
Koch et al., J. Am. Chem. Soc., vol. 95, 2957, (1973).

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