US3718703A
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Bisorganoalkaline earth metal compounds and a method of preparing same from bisorganomercurials
Assignee: Dow Chemical Co
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Filing: 1970-07-02
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Granted: 1973-02-27
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Expires: 1990-07-02
Abstract
Abstract Novel bisorganoalkaline earth metal compounds are prepared by reacting bisorganomercurials with calcium, strontium or barium. The novel process is conducted in a solvent. As an example, dibenzylcalcium is prepared by reacting dibenzylmercury with calcium in tetrahydrofuran. The bisorganoalkaline earth metal compounds are useful as metallating reagents in organic synthesis and as initiators in the polymerization of vinyl monomers, such as styrene and butadiene.
Inventors
- 👤 P West
- 👤 M Woodville
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:25
CPC Classifications
C; C08; C08F; C08F4/00; C08F4/06; C08F4/12; C07; C07F; C07F3/00; C08F36/00; C08F36/02; C08F36/04
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
17 words
separating the liquid phase containing the product from precipitated mercury and residual metallic calcium, strontium or barium.
Claim 2
Dependent Claim
10 words
The process defined in claim 1 wherein M is calcium.
Claim 3
Dependent Claim
10 words
The process defined in claim 1 wherein M is strontium.
Claim 4
Dependent Claim
10 words
The process defined in claim 1 wherein M is barium.
Claim 5
Dependent Claim
12 words
The process defined in claim 1 wherein each R is the same.
Claim 6
Dependent Claim
27 words
The process defined in claim 5 wherein R is an alkyl, aryl, alkaryl, aralkyl, alkenyl, cycloalkenyl, cycloalkyl, or aralkynyl group of from one to 10 carbon atoms.
Claim 7
Dependent Claim
27 words
The process defined in claim 6 wherein R is alkyl of from one to four carbon atoms, phenyl, benzyl, p-t-amylbenzyl, vinyl, allyl, cyclopropyl, cyclohexenyl, indenyl or phenylethynyl.
Claim 8
Dependent Claim
19 words
The process defined in claim 1 wherein the reaction solvent is a liquid, aliphatic or cycloaliphatic ether or polyether.
Claim 9
Dependent Claim
11 words
The process defined in claim 8 wherein said solvent is tetrahydrofuRan.
Claim 10
Dependent Claim
19 words
The process defined in claim 1 wherein the reaction temperature is from about -70* C. to about 70* C.
Claim 11
Dependent Claim
19 words
The process defined in claim 1 wherein the reaction temperature is from about -10* C. to about 30* C.
Claim 12
Dependent Claim
67 words
A substantially pure bisorganoalkaline earth compound corresponding to the formula R-M-R, wherein M is calcium, strontium or barium, and R is an alkyl, aryl, alkaryl, aralkyl, alkenyl, cycloalkyl, cycloalkenyl, or alkoxy- or aryloxy-substituted alkyl, aryl, alkaryl, aralkyl, alkenyl, cycloalkyl or cycloalkenyl group having a total carbon content of from one to 25 carbon atoms; the conjugate acid (R-H) of said compound having a pKa greater than triphenylmethane.
Claim 13
Dependent Claim
33 words
The compound defined in claim 12 wherein the R groups are the same, and R is an alkyl, aryl, alkaryl, aralkyl, alkenyl, cycloalkyl or cycloalkenyl group of from one to 10 carbon atoms.
Claim 14
Dependent Claim
24 words
The compound defined in claim 13 wherein R is alkyl of from one to four carbon atoms, phenyl, benzyl, p-t-amylbenzyl, vinyl, allyl, cyclopropyl, cyclohexenyl.
Claim 15
Dependent Claim
12 words
The compound defined in claim 14 wherein R is methyl or ethyl.
Claim 16
Dependent Claim
10 words
The compound defined in claim 14 wherein R is phenyl.
Claim 17
Dependent Claim
10 words
The compound defined in claim 14 wherein R is benzyl.
Claim 18
Dependent Claim
10 words
The compound defined in claim 14 wherein R is p-t-amylbenzyl.
Claim 19
Dependent Claim
10 words
The compound defined in claim 14 wherein R is allyl.
Claim 20
Dependent Claim
10 words
The compound defined in claim 12 wherein M is calcium.
Claim 21
Dependent Claim
10 words
The compound defined in claim 12 wherein M is strontium.
Claim 22
Dependent Claim
10 words
The compound defined in claim 12 wherein M is barium.
Claim 23
Dependent Claim
19 words
The process defined in claim 1 wherein R is a hydrocarbyl radical of from one to 25 carbon atoms.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |