Improved process for producing pure boronic and borinic esters

Details Improved process for producing pure boronic and borinic esters Improved process for producing pure boronic and borinic esters

1987-12-17

1989-09-26

Moyer, Donald B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549213, 558298, C07F 504

Patent

active

048701777

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:
Brown, Herbert C. et al., Organometallics 1983, 2, pp. 1316-1319.
Brown, Herbert C. et al., Organometallics 1985, 4, pp. 1788-1792.

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