2-Formyl-3-protected hydroxy-5-oxocyclopent-1-eneheptanoic acid and its esters are stereoselectively reduced to the corresponding 2.beta.-formyl-3.alpha.-protected hydroxy-5-oxocyclopentane-1.alpha.-heptanoic acid and esters with chromous sulfate. The compounds so produced are useful as intermediates to PGE.sub.1 and its esters, which compounds exhibit hypotensive and smooth muscle-stimulating properties.
2-甲酰基-3-保护羟基-5-酮基环戊-1-烯
庚酸及其
酯类,经
铬酸铬选择性还原为相应的2-β-甲酰基-3-α-保护羟基-5-酮基
环戊烷-1-α-
庚酸和
酯类。所得化合物可用作
PGE.sub.1及其
酯类的中间体,这些化合物具有降压和平滑肌刺激作用。