Halogenation process for preparing 2-(oxoazetidinyl)-3-chloromet

Details Halogenation process for preparing 2-(oxoazetidinyl)-3-chloromet Halogenation process for preparing 2-(oxoazetidinyl)-3-chloromet

1987-03-09

1988-12-06

Berch, Mark L.

Organic compounds -- part of the class 532-570 series

Organic compounds

Unsubstituted hydrocarbyl chain between the ring and the -c-...

260694, C07B 3900, C07D20508

Patent

active

047897406

ABSTRACT:
A process for preparing an azetidinone derivative represented by the formula (I) ##STR1## wherein R.sup.1 represents an aryl group, arylmethyl group or aryloxymethyl group, R.sup.2 represents hydrogen atom or a carboxyl-protecting group and R.sup.3 represents an alkyl group or aryl group, the process comprising reacting an azetidinone derivative represented by the formula (II) ##STR2## wherein R.sup.1, R.sup.2 and R.sup.3 are as defined above with a chlorinating agent.

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patent: 4443598 (1984-04-01), Yoshioka
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Uneyama, Chem Letters 1984, 529.
Mastragostino, Electroanalytical Chem., 56, 117 (1974).
Cooper II, Tet. Letters 21, 781 (1980).
Yoshioka I, Tet. Letters 21, 3J 1-354 (1980).
Torii, Tet. Letters 23, 2187 (1982).

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