Cyclopentane derivatives

Details Cyclopentane derivatives Cyclopentane derivatives

1986-02-28

1987-12-29

Brust, Joseph Paul

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

Organic compounds

Sulfonate esters

549332, 558432, 560220, 564189, 568 27, 568 38, 568 56, 568420, 568579, 568591, C07C12146

Patent

active

047162414

ABSTRACT:
Novel cyclopentane derivatives which are useful as an intermediate for the preparation of N-(L-aspartyl)-N'-(2,2,5,5-tetramethylcyclopentanecarbonyl)-R-1,1-diaminoe thane are represented by the formula (I) ##STR1## wherein R.sub.1 is hydrogen and R.sub.2 is cyano, formyl, carbamoyl, alkanesulfonyloxy, or ##STR2## wherein R.sub.3 and R.sub.4 are the same or different and represent alkyl, substituted alkyl or R.sub.1 and R.sub.2 are combined to be methylsulfinylmethylene, acetoxymethylthiomethylene, halomethylthiomethylene, methylthiomethylene, alkoxy-methylene, or --CH.sub.2 --O--.

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patent: 3627815 (1971-12-01), Hall, Jr.
patent: 4571308 (1986-02-01), Zanno et al.
patent: 4571345 (1986-02-01), Verlander et al.
patent: 4572799 (1986-02-01), Zanno et al.
patent: 4622417 (1986-11-01), Barnett et al.
patent: 4622418 (1986-11-01), Barnett et al.
Huguet et al.; Helv. Chim. Acta, 65, (1982), pp. 2413-2421.

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