An intramolecular Diels-Alder approach to the spirotetronic acid subunits of the quartromicins
摘要:
Three of the four diastereomeric spirotetronates (2, 19 and 24) corresponding to the quartromicins were synthesized by a sequence featuring the intramolecular Diels-Alder reaction of 3. An olefin isomerization pathway accounts for formation of the second most abundant cycloadduct, 16. (C) 1997 Elsevier Science Ltd.
An intramolecular Diels-Alder approach to the spirotetronic acid subunits of the quartromicins
摘要:
Three of the four diastereomeric spirotetronates (2, 19 and 24) corresponding to the quartromicins were synthesized by a sequence featuring the intramolecular Diels-Alder reaction of 3. An olefin isomerization pathway accounts for formation of the second most abundant cycloadduct, 16. (C) 1997 Elsevier Science Ltd.