Mark J Robbins

US Patent:

50617990, Oct 29, 1991

Filed:

Jun 25, 1990

Appl. No.:

7/542621

Inventors:

David G. Lincoln - Webster NY
Mark J. Robbins - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C07D47102

US Classification:

544256

Abstract:

A multi-step process for the preparation of tetraazaindenes provides new, intermediate compounds and methods for their formation. A first method or step (1) of the process comprises reacting Meldrum's acid (cyclic dimethylmethylene malonate) or a related compound with an orthoester to form a first intermediate. Another method or step (2) of the invention comprises reacting the first intermediate with a triazole to form a second intermediate. A third method or step (3) comprises reacting the second intermediate with a base to form a tetraazaindene salt from which the tetraazaindene can then be formed. Other methods of the invention comprise sequential combinations of the three new methods above described. For example, Meldrum's acid is reacted with triethylorthoacetate in the presence of pyridine and ethyl acetate to form a first intermediate represented by the structural formula ##STR1## The first intermediate is then reacted with 3-amino-5-methylthio-1,2,4-triazole to form a second intermediate represented by the structural formula ##STR2## Upon reaction with sodium carbonate, a tetraazaindene having the formula ##STR3## is produced. Other related compounds are formed when reactants related to those set forth above are employed.

US Patent:

51030160, Apr 7, 1992

Filed:

Apr 1, 1991

Appl. No.:

7/678776

Inventors:

David G. Lincoln - Webster NY
Mark J. Robbins - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C07D24914
C07D24912

US Classification:

5482638

Abstract:

A multi-step process for the preparation of tetraazaindenes provides new, intermediate compounds and methods for their formation. A first method or step (1) of the process comprises reacting Meldrum's acid (cyclic dimethylmethylene malonate) or a related compound with an orthoester to form a first intermediate. Another method or step (2) of the invention comprises reacting the first intermediate with a triazole to form a second intermediate. A third method or step (3) comprises reacting the second intermediate with a base to form a tetraazaindene salt from which the tetraazaindene can then be formed. Other methods of the invention comprise sequential combinations of the three new methods above described. For example, Meldrum's acid is reacted with triethylorthoacetate in the presence of pyridine and ethyl acetate to form a first intermediate represented by the structural formula ##STR1## The first intermediate is then reacted with 3-amino-5-methylthio-1,2,4-triazole to form a second intermediate represented by the structural formula ##STR2## Upon reaction with sodium carbonate, a tetraazaindene having the formula ##STR3## is produced. Other related compounds are formed when reactants related to those set forth above are employed.

US Patent:

51622912, Nov 10, 1992

Filed:

Mar 12, 1992

Appl. No.:

7/851404

Inventors:

Michael E. Long - Penfield NY
David L. Van Galio - Brockport NY
Samuel S. Brody - Pittsford NY
Mark J. Robbins - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

B41M 535
B41M 526

US Classification:

503227

Abstract:

A method of solvent fusing thermal images is disclosed herein an inert gas is bubbled through a liquid solvent to vaporize the solvent. The solvent temperature is controlled. The vaporized solvent fuses the image.

US Patent:

51910802, Mar 2, 1993

Filed:

Jan 21, 1992

Appl. No.:

7/823279

Inventors:

David G. Lincoln - Webster NY
Mark J. Robbins - Rochester NY

Assignee:

Eastman Kodak Company - Rochester NY

International Classification:

C07D47102

US Classification:

544263

Abstract:

A multi-step process for the preparation of tetraazaindenes provides new, intermediate compounds and methods for their formation. A first method or step (1) of the process comprises reacting Meldrum's acid (cyclic dimethylmethylene malonate) or a related compound with an orthoester to form a first intermediate. Another method or step (2) of the invention comprises reacting the first intermediate with a triazole to form a second intermediate. A third method or step (3) comprises reacting the second intermediate with a base to form a tetraazaindene salt from which the tetraazaindene can then be formed. Other methods of the invention comprise sequential combinations of the three new methods above described. For example, Meldrum's acid is reacted with triethylorthoacetate in the presence of pyridine and ethyl acetate to form a first intermediate represented by the structural formula ##STR1## The first intermediate is then reacted with 3-amino-5-methylthio-1,2,4-triazole to form a second intermediate represented by the structural formula ##STR2## Upon reaction with sodium carbonate, a tetraazaindene having the formula ##STR3## is produced. Other related compounds are formed when reactants related to those set forth above are employed.