Process for the production of unsaturated ketones

Details Process for the production of unsaturated ketones Process for the production of unsaturated ketones

1977-02-11

1978-10-24

Thomas, Jr., James O.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260593R, 252522, C07C 4500, C07C 4961

Patent

active

041221192

ABSTRACT:
There is disclosed a process for preparing unsaturated ketones especially terpenoid ketones, by subjecting a substituted propargyl alcohol of formula (II) ##STR1## wherein R is a group containing 1 or 2 substituted or unsubstituted alkyl- or alkylene units containing 4 carbon atoms each to a thermal treatment sufficient to rearrange its structure in order to obtain structurally isomeric unsaturated ketones of formula I ##STR2## wherein one of the substituents X.sub.3 and X.sub.4 is hydrogen and the other and Z.sub.2 together form a bond. The process can be effected in the presence of an isomerization catalyst, which leads to high percentage of .alpha...beta.,.gamma...delta.-unsaturated ketones. The ketones of formula I are useful as perfumes and as intermediates for the production of terpenoid compounds.

REFERENCES:
patent: 3480677 (1969-11-01), Meuly et al.
patent: 3668255 (1972-06-01), Meuly et al.
patent: 3816535 (1974-06-01), Hug-Inderbitgin et al.
patent: 3886215 (1975-05-01), Desimone et al.
patent: 3919250 (1975-11-01), Pauling
patent: 3962311 (1976-06-01), Loeliger
patent: 3976700 (1976-08-01), Desimone
Swaminathan et al., Chem. Reviews, vol. 71, No. 5, pp. 429-438 (1971).

Affiliated with

Also associated with

Rating

Process for the production of unsaturated ketones does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for the production of unsaturated ketones, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for the production of unsaturated ketones will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2336081