Silyl, benzyl, p-nitrobenyl, or methyl esters of diazoacetate, a

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

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534556, 534560, C07C11300

Patent

active

045255822

ABSTRACT:
A novel synthon useful in the conversion of penicillin is a compound of the formula ##STR1## wherein R.sub.3 is a number of the group consisting of trimethyl-silyl, t-butyl dimethyl silyl, trimethyl silyl, methyl, benzyl or nitrobenzyl, and R.sub.5 is the same or different member of the group R.sub.3 is prepared by the naphthalene sulfonyl azide exchange reaction with benzyl acetoacetate, p-nitrobenzylacetoacetate, or methylacetoacetate to obtain the corresponding 2-diazo compound which is then silylated in hexamethyl-disalazine.

REFERENCES:
patent: 4073799 (1978-02-01), Kondo et al.
Kaufmann et al., Index Chemicus, vol. 31 #102512 (1968).
Regitz, Ber. Deut. Chem. Gesell., vol. 99, pp. 3128-3147 (1966).

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