Alkylation process

Details Alkylation process Alkylation process

1975-07-21

1978-01-24

Gallagher, Richard J.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2603262, 26032625, 26032627, 26032646, 2603265J, 260621R, 260671M, C07D20734, C07D20732

Patent

active

040703665

ABSTRACT:
Substituted pyrrole compounds, such as 3-ethyl-4-methyl-5-carbethoxy pyrrole, 2,4-dimethyl-3-acetyl pyrrole and 2-methyl-5-carboxy pyrrole-4-propionic acid diethyl ester, are alkylated in a single step by reaction with an aldehyde or ketone in the presence of both an acid condensing agent such as hydriodic acid and a compatible reducing agent such as metallic zinc or stannous chloride. Suitable carbonyl reactants include formaldehyde, paraldehyde, isobutyraldehyde, acetone, cyclohexanone and methyl-isobutyl ketone.

REFERENCES:
patent: 3271465 (1966-09-01), Krewer et al.

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