Method for purification of cyclopentenolones

Details Method for purification of cyclopentenolones Method for purification of cyclopentenolones

1982-04-27

1983-03-15

Reamer, James H.

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

Organic compounds

Oxygen containing

C07C 4585

Patent

active

043768717

ABSTRACT:
Purification of cyclopentenolone such as, for example, 2-propargyl-3-methyl-4-hydroxy-2-cyclopenten-1-one, which is an intermediate to manufacture pyrethroidal insecticides, is made by reacting with calcium chloride to form the cyclopentenolone-calcium chloride complex and then decomposing the complex with water.

REFERENCES:
patent: 2813905 (1957-11-01), Lyons et al.
patent: 3161684 (1964-12-01), Wilkinson et al.
patent: 3536495 (1970-10-01), Fly et al.
Yuki, Chem. Abst., vol. 94, # 103,148z (1981).
Sharpless, J. Org. Chem., vol. 40(9), pp. 1253-1256, (1975).

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