3-Chloro-2-chloromethyl-1-propene → Di(tert-butyl)[2-(chloromethyl)-2-propenyl]phosphine

Temperature

60 °C

FIG. 1: 9-(2-{[di(tert-butyl)phosphino]methyl}-2-propenyl)-9-phosphabicyclo[3.3.1]nonane A mixture of di-tert-butylphoshine (5 g, 34.1 mmol) and 3-chloro-2-chloromethyl-1-propene (14.04 g, 69 mmol) was dissolved in degassed acetonitrile (70 ml) and heated to 60° C. for 16 hours. The solvent was removed in vacuo and the product was suspended in hexane (50 ml). After filtration the product was washed with hexane (2 times 40 ml). The white solid salt was neutralized in a mixture of toluene (50 ml) and water (30 ml) with HNEt2 (5 ml) under reflux conditions. The toluene layer was separated, washed with water (2 times 30 ml) and removed in vacuo, to yield 3.14 g (40%) of di(tert-butyl)[2-(chloromethyl)-2-propenyl]phosphine. The product could be characterized by showing a distinct resonance signals in 31P NMR at δ=+21.7 ppm.

1. customThe solvent was removed in vacuo
2. filtrationAfter filtration the product
3. washwas washed with hexane (2 times 40 ml)
4. additionThe white solid salt was neutralized in a mixture of toluene (50 ml) and water (30 ml) with HNEt2 (5 ml) under reflux conditions
5. customThe toluene layer was separated
6. washwashed with water (2 times 30 ml)
7. customremoved in vacuo

ORD record

ord-e9d084c5866543be9da476cbeaabc1c6

Source dataset

uspto-grants-2007_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US07265242B2