Oleum sulfonation of phenyl quaternary alkyl ammonium and phosph

Details Oleum sulfonation of phenyl quaternary alkyl ammonium and phosph Oleum sulfonation of phenyl quaternary alkyl ammonium and phosph

1988-11-16

1990-06-05

Lee, Mary C.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544158, 546301, 546342, 548551, 548556, 548573, 558270, 558271, C07D21142, C07D21146, C07C14326

Patent

active

049315633

ABSTRACT:
A process is provided for obtaining sulfophenyl quarternary ammonium or phosphonium substituted carbonic acid esters. The important step in this process involves reacting a phenyl quaternary ammonium or phosphonium substituted carbonic ester with oleum that contains from 0.5 to 33% sulfur trioxide. Amounts in excess of 33% sulfur trioxide lead to increased reaction times and, eventually, unacceptable product conversons.

REFERENCES:
patent: 3987113 (1976-10-01), Sasaki et al.
patent: 4751015 (1988-06-01), Humphreys et al.
patent: 4788316 (1988-11-01), Thornthwaite et al.
patent: 4818426 (1989-04-01), Humphreys et al.
"Studies on the Nitration of m-Cresol. A New Selective Method for the Preparation of 3-Methyl-6-nitrophenol", Sasaki et al. Institute for Biological Science, Sumitomo Chemical Co., Ltd., 1976.

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