Process for preparing mixture of trimethyl and dimethylmethylene

Details Process for preparing mixture of trimethyl and dimethylmethylene Process for preparing mixture of trimethyl and dimethylmethylene

1994-03-17

1995-01-03

Reamer, James H.

Perfume compositions

Perfume compositions

Ring containing active ingredient

549356, 549416, A61K 746

Patent

active

053786858

ABSTRACT:
Described is a process for preparing trimethyl and dimethylmethylene propyl polyhydropyran derivatives including compounds defined according to the structure: ##STR1## which defines a mixture wherein in the mixture, in each of the compounds one of the dashed lines is a carbon-carbon double bond and each of the other of the dashed lines represents a carbon-carbon single bond as well as the compound having the structure: ##STR2## products produced thereby; perfumery uses of such products; process intermediates of such process including compounds defined according to the structures: ##STR3## wherein X represents chloro or bromo.

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patent: 4192782 (1980-03-01), Hall et al.
patent: 4962090 (1990-10-01), Sprecker et al.
patent: 5162551 (1992-11-01), Broekhof et al.
Gramenitskaya, et al, Zh. Org. Khim., 1975, 11(5), pp. 990-995 (abstracted at Chem. Abstracts) vol. 83, 1975, Abstract No. 58767k.
Hinnen, et al, Bull. Soc. Chim. France 1964(7), pp. 1492-1498 (abstracted at Chem. Abstracts) vol. 61, No. 10648c-h.
Williams, et al, (II), J. Am. Chem. Soc. 72, pp. 5738-5743, (1950), title "A Synthesis of Substituted Pyrans".

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