Caprolactam → Hexahydro-2-oxo-N-vinyl-1H-azepine-1-carboxamide

HRID 371339

Reaction equation

[C:1]1(=[O:8])[NH:7][CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.C([O-])(=O)CCCCCCCCCCC.C([O-])(=O)CCCCCCCCCCC.C([Sn+2]CCCC)CCC.[CH:46]([N:48]=[C:49]=[O:50])=[CH2:47]>C(OCC)(=O)C>[CH:46]([NH:48][C:49]([N:7]1[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2][C:1]1=[O:8])=[O:50])=[CH2:47]

Participants

Conditions

Temperature: 50 °C

Procedure

113 parts of ε-caprolactam, 91 parts of ethyl acetate and 0.015% of dibutyl-tin dilaurate are initially taken in a reaction vessel and are heated at about 50° C. A mixture of 69 parts of vinyl isocyanate and 91 parts of ethyl acetate is added dropwise in the course of 1 hour, after which the mixture is allowed to continue reacting for a further 5 hours. A pale yellow clear solution is obtained. Content of blocked isocyanate groups: 11.5%. Preparation of component (C)

Workup

additionis added dropwise in the course of 1 hour
customA pale yellow clear solution is obtained

Sources & evidence

ORD record: ord-00cde99996754a28b9ecfe7f365db67c
Source dataset: uspto-grants-1985_07
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US04530978

Linked notes

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