Metathesis of acetylenes

Details Metathesis of acetylenes Metathesis of acetylenes

1987-05-27

1988-06-28

Davis, Curtis R.

Chemistry of hydrocarbon compounds

Unsaturated compound synthesis

Triple-bond product

C07C 200

Patent

active

047540974

ABSTRACT:
Described are novel bimetallic complexes particularly useful as homogeneous catalysts for the metathesis of alkynes and metathesizable functionally substituted alkynes, and methods for the preparation of such complexes. The complexes are formed from (i) a Group VI-B metal compound having (a) quadruple metal to metal bonds between a pair of Group VI-B metal atoms at least one of which has an atomic number above 24, and (b) four monovalent anions with a k.sub.A greater than 10.sup.-14, and (ii) a Group III-A phenoxide, a Group III-A alkoxide or a Group IV-B metal alkoxide. Displacement of two of the anions appears to occur during formation of the complex. Usually the complexes can be produced very easily and quickly. All that is required is to establish intimate contact between components (i) and (ii), preferably in an innocuous liquid organic solvent. Addition of a small amount of a nitrile gives a faster and cleaner reaction. In some cases use of slightly elevated temperatures is desirable. A variety of acetylenic compounds were metathesized by use of a variety of these complexes as catalysts. In the course of the work, the following complexes were prepared, isolated, and characterized:

REFERENCES:
Montreux et al., J. Mol. Catal., 1977, 2, 73-82.
Devarajan et al., J. Organomet. Chem. 1979, 181, 99-104.
Clark et al., J. Am. Chem. Soc. 1978, 100, 6774-6776.
Wengrovius et al., J. Am. Chem. Soc. 1981, 103, 3932-3934.
Sancho et al., J. Mol. Catal. 1982, 15, 75-79.
Schrock et al., Organometallics 1982, 1, 1645-1651.
McCullough et al., J. Am. Chem. Soc. 1984, 106, 4067-4068.
Bencheick et al., J. Mol. Catal. 1982, 15, 93-101.
Lamotte et al., Cryst. Struct. Comm. 1981, 10, 59-64.
Matsuda et al., Acc. Chem. Res. 1984, 17, 51-56.
Cotton et al., J. Coord. Chem., 1971, 1, 161-172.
McCarley et al., Adv. Chem. Ser. 1976, 150, 318-334.
Green et al., J. Chem. Soc. Dalton Trans. 1982, 2519-2525.
Telser et al., J. Inorg. Chem. 1984, 23, 1798-1803.
Katovic et al., J. Am. Chem. Soc. 1975, 97, 5300-5302.
Schrock et al., Inorg. Chem. 1983, 22, 2801-2806.
Santure et al., Inorg. Chem. 1983, 22, 1877-1883.
Santure et al., Inorg. Chem. 1985, 24, 371-378.
Stephenson et al., J. Chem. Soc. 1964, 2538-2541.

Affiliated with

Also associated with

Rating

Metathesis of acetylenes does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1916108