Process for the preparation of diazomethane

Organic compounds -- part of the class 532-570 series – Organic compounds – Diazo or diazonium

Reexamination Certificate

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C534S558000

Reexamination Certificate

active

06962983

ABSTRACT:
A method for the production of diazomethane comprising the steps of a) feeding a base and a diazomethane precursor into a reactor vessel; b) generating gaseous diazomethane by allowing the base and the gaseous diazomethane precursor to react; and c) removing the gaseous diazomethane using a diluent gas.

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patent: 0 916 648 (1999-05-01), None
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Proctor et al., “Development of a Continuous Process for the Industrial Generation of Diazomethane”, Organic Process Research and Development, 6, 884-892, 2002.
Bernd-Eistert, “Synthesis with Diazomethane”, 513-570, no date provided.
Black, T.H., “The Preparation and Reaction of Diazomethane,” Aldrichimica Acta 16(1) 3-10 (1983).
Chemistry in Industry, Feb. 21, 1994, p. 122/123, Nov. 5, 1990.
De Boer, T.H. J., and Backer, H. J., “A New Method for the Preparation of Diazomethane,” Recueil 73, 229-234 (1954).
Yamaguchi, Masato (Kurita Water Industries, Ltd.), “Preparation of diazomethane ether solution,” Chemical Abstracts, vol. 110, No. 5, Jan. 30, 1989, Columbus, OH, U.S., Abstract No. 38611c.
Ruehle et al., Chemical Abstracts, vol. 91, No. 19, Nov. 5, 1979 Columbus, OH, US, Abstract No. 157184.

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