Process for preparation of tertiary alcohol esters

Details Process for preparation of tertiary alcohol esters Process for preparation of tertiary alcohol esters

2005-03-29

2005-03-29

Killos, Paul J. (Department: 1625)

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

Organic compounds

Carboxylic acid esters

C560S231000

Reexamination Certificate

active

06872846

ABSTRACT:
The production process of the present invention comprises a step of allowing a carboxylic acid derivative represented by the formula (1):wherein ring Z is a monocyclic or polycyclic non-aromatic or aromatic ring, and R1is a halogen atom or a group represented by the formula (2):in-line-formulae description="In-line Formulae" end="lead"?—OR  (2)in-line-formulae description="In-line Formulae" end="tail"?wherein R is a hydrogen atom or a hydrocarbon group, to react with an organometallic compound represented by the formula (3):in-line-formulae description="In-line Formulae" end="lead"?R2-M  (3)in-line-formulae description="In-line Formulae" end="tail"?wherein R2is a hydrocarbon group, and M is a metallic atom which may have a ligand, or the formula (4):in-line-formulae description="In-line Formulae" end="lead"?-MgY  (4)in-line-formulae description="In-line Formulae" end="tail"?wherein Y is a halogen atom,and a carboxylic acid halide represented by the formula (5):wherein R3is a hydrocarbon group or a heterocyclic group, and X is a halogen atom,to yield the tertiary alcohol ester represented by the formula (6):wherein Z, R2and R3have the same meanings as defined above.According to the present invention, a tertiary alcohol compound having a tertiary carbon combined with a ring group can be easily and efficiently produced from carboxylic acid derivative which is comparatively cheap and readily available.

REFERENCES:
patent: 6248920 (2001-06-01), Takechi et al.
patent: 1 043 298 (2000-10-01), None
patent: 1 070 699 (2001-01-01), None
English translation of Japanese Unexamined Patent Application Publication No. 9-052864 (Feb. 25, 1997).

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