Large scale synthesis of 1,2,4- and 1,3,4-oxadiazole...

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

Reexamination Certificate

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Reexamination Certificate

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06951946

ABSTRACT:
Disclosed are efficient and scalable processes for preparing 1,2,4- and 1,3,4-oxadiazole carboxylates from readily available starting materials.

REFERENCES:
patent: 3367959 (1968-02-01), Fetscher et al.
Hett et al, Organic Process Research and Development, vol. 6, p. 896-897 (2002).
Surjono et al, Book of Abstracts, 218thACS National Meeting, New Orleans, Aug. 22-26 (1999).
Wei et al, Thermochimica Acta vol. 421, p. 1-9 (2004).
Borg et al,J. Org. Chem., vol. 60, p. 3112-3120 (1995).
□□Branco et al, Tetrahedron, vol. 48, No. 30, p. 6335-6360 (1992).

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