Ring opening metathesis approach to the isoprostanes
摘要:
A new route to enantiomerically pure isoprostane analogs is described. Ring opening metathesis of bicyclo[3.2.0]heptene (3) with TBS-protected allyl alcohol generates the syn-disubstituted cyclopentyl product (+/-)-4. Diene (+/-)-4 can be converted in a straightforward manner to aldehyde (+/-)-7. Asymmetric alkylations of aldehyde (+/-)-7 yield a series of enantiomerically pure isoprostane analogs (2a-d). (C) 2000 Elsevier Science Ltd. All rights reserved.
Ring opening metathesis approach to the isoprostanes
摘要:
A new route to enantiomerically pure isoprostane analogs is described. Ring opening metathesis of bicyclo[3.2.0]heptene (3) with TBS-protected allyl alcohol generates the syn-disubstituted cyclopentyl product (+/-)-4. Diene (+/-)-4 can be converted in a straightforward manner to aldehyde (+/-)-7. Asymmetric alkylations of aldehyde (+/-)-7 yield a series of enantiomerically pure isoprostane analogs (2a-d). (C) 2000 Elsevier Science Ltd. All rights reserved.