Process for the manufacture of enol derivatives, and intermediat

Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal

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546208, 546209, 544 60, 546210, 546212, 544 62, 546213, 546214, 544111, 546256, 546270, 544131, 546271, 546275, 544133, 546276, 546277, 544134, 546278, 546280, 544135, 546281, 546283, 544137, 546284, 544 16, 544138, 544 30, 546207, 544139, 544140, 544146, 544149, 544152, 544337, 544359, 544364, 544366, 544367, 544368, 544369, 544370, 544374, 544379, 2602454, 2603303, 2603474, 546193, 546194, 546198, 546199, 546205, C07D20508, C07D40314, C07D40304, C07D40312

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042934621

ABSTRACT:
The invention concerns a process for the manufacture of 7.beta.-amino-3-cephem-3-ol-4-carboxylic acid compounds by ring closure of esters of 2-[4-(substituted-thio)-3-acylamino-2-oxoazetidin-1-yl]-3-substituted-amin o-crotonic acids and solvolyzing the enamino group in the resulting 7.beta.-acylamino-3-substituted-amino-cephem-4-carboxylic acid esters.

REFERENCES:
patent: 3950352 (1976-04-01), Wolfe
patent: 3959266 (1976-05-01), Pall'Asta
patent: 3960881 (1976-06-01), Kulkolja et al.
patent: 3975383 (1976-08-01), Naylor et al.
patent: 4036835 (1977-07-01), Foglio et al.
patent: 4079181 (1978-03-01), Tsuji et al.
Woodward et al., Chem. Abs. 8e, 29052, (1976).

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