Process for lithium mono- and diorganylborohydrides

Details Process for lithium mono- and diorganylborohydrides Process for lithium mono- and diorganylborohydrides

1986-08-29

1988-09-20

Shaver, Paul F.

Organic compounds -- part of the class 532-570 series

Organic compounds

C07F 502

Patent

active

047727519

ABSTRACT:
Improved processes for liberating boronic, RB(OR').sub.2, and borinic, RR'BOR', esters from their "ate" complexes, free of alcohol are provided. Pyrolysis of lithium organylborates LiRB(OR').sub.3 and LiRR'BOR', wherein R is an organyl group and R' is straight or branched-chain lower alkyl, directly yields the relatively volatile boronic and borinic esters in high purity, leaving behind a residue of lithium alkoxide. Treatment of the lithium organylborates with an appropriate acid halide cleanly liberates either volatile or non-volatile boronic or borinic esters, readily separated from the lower alkyl ester produced as a by-product. The novel compound lithium dimethylborohydride is also provided.

REFERENCES:
patent: 3078313 (1963-02-01), Brown
patent: 3161686 (1964-12-01), Brown
patent: 3254129 (1966-05-01), Brown
patent: 3984479 (1976-10-01), Brown
Chemical Abstracts 100 174888u (1984).
Chemical Abstracts 101 151916h (1984).

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