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US 12,428,361 B2Granted
Processes and intermediates for the preparation of carbaprostacyclin analogues
AssigneeChirogate International Inc.
InventorsChun-Yu Lin, Tzyh-Mann Wei, Shih-Yi Wei
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Abstract
The invention relates to processes for preparing carbaprostacyclin analogues and intermediates prepared from the processes. The invention also relates to cyclopentenone intermediates in racemic or optically active form.
Claims1
A compound of Formula A8:
- wherein Y is —CH2OP or —COOR1;
- X is F, Cl, Br, I, or —OTs;
- P is H or a hydroxyl protective group;
- and R1 is C1-7-alkyl, aryl or aralkyl, each of which is unsubstituted or substituted by C1-4-alkyl, C2-7-alkenyl, C2-7-alkynyl, nitro, halogen or alkoxy.
1 more element
Dependencies are inferred from the claim text.