Electrical contacts to silicon

United States Patent 2793420

3R-Phthalimido-1-(1'S-p-nitrobenzyloxycarbonyl-2'-methylprop-2'-enyl)- 4-oxo-2-azetidinesulfenic acid is prepared by scission of the S-C2 bond of p-nitrobenzyl 6-phthalimido-2,2-dimethylpenam-3-carboxylate-1-oxide. The sulfenic acid can be converted to desacetoxycephalosporin.

Johnston, Ralph L.
Rulison, Raymond L.

US50323055A

05/28/1957

04/22/1955

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BELL TELEPHONE LABOR INC

438/612

136/201, 136/237, 205/157, 205/917, 228/123.1, 228/180.5, 228/188, 228/209, 257/766, 257/784, 257/E21.175, 257/E23.182, 428/620, 428/637, 428/641, 428/648, 438/652, 438/660

C07D403/04; C07D501/10; H01L21/00; H01L21/288; H01L23/04; H01L23/42; H01L29/00

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