Triethylborane → HCID 86741582, compound

Copoly(N-methyl-N-vinylacetamide/maleic anhydride) was prepared as follows. About 5 g of maleic anhydride free of maleic acid was dissolved in about 32 g of tetrahydrofuran. This solution was placed in a flask fitted with a dropping funnel, mechanical stirrer and nitrogen inlet. The dropping funnel was charged with about 4 g of N-methylvinylacetamide dissolved in about 13 g of tetrahydrofuran and 0.25 ml of 90% t-butyl hydroperoxide. The temperature of the reaction was adjusted to about 30° C., and the N-methyl-N-vinylacetamide solution was added dropwise over a period of about 4 hours. About 0.5 ml of a 1 Molar solution of triethylborane in hexane was added to the reaction flask at the beginning of the reaction run, and every hour thereafter. At the end of about 7 hours reaction time, the product polymer was precipitated by addition of about 50 ml of petroleum ether. Ths slurry was filtered and washed with diethylether and dried.

1. customThis solution was placed in a flask
2. customfitted with a dropping funnel, mechanical stirrer and nitrogen inlet
3. customwas adjusted to about 30° C.
4. customAt the end of about 7 hours reaction time
5. customthe product polymer was precipitated by addition of about 50 ml of petroleum ether
6. filtrationThs slurry was filtered
7. washwashed with diethylether
8. customdried

ORD record

ord-20dd3c9e996846798f5585a63a58e8ec

Source dataset

uspto-grants-1987_06

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US04673508