Optically active 4-carbalkoxy-2-azetidinones

Details Optically active 4-carbalkoxy-2-azetidinones Optically active 4-carbalkoxy-2-azetidinones

1985-10-28

1987-12-29

Berch, Mark L.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540364, 540355, 560180, 560170, 560150, 564158, 564160, C07D20508, C07B 4104, C07B 4102, C07B 5300

Patent

active

047162260

ABSTRACT:
Novel 2-azetidinones of the formula ##STR1## wherein R is alkyl of 1 to 4 carbon atoms, R.sub.1 is selected from the group consisting of hydrogen, --OH, protected hydroxy and --OCH.sub.2 --COOR', R' is selected from the group consisting of hydrogen and alkyl of 1 to 4 carbon atoms and R.sub.2 is selected from the group consisting of alkyl of 1 to 4 carbon atoms and hydroxyl protective group and a novel process and novel intermediates for their preparation and a process for the preparation of compounds of the formula ##STR2## wherein R has the above definition, R'd is selected from the group consisting of hydrogen, --OH and protected hydroxyl and R.sub.3 is selected from the group consisting of hydrogen and R.sub.3 ', R.sub.3 ' is amino protective group which are useful intermediates.

REFERENCES:
McOmie, Protective Groups in Organic Chemistry, pp. 96-97, (1973).
DeMarinis, Tet. Letters 23, 731-4, (1982).

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