Formal [4+2] cycloaddition of cyclobutanones bearing alkyne–cobalt complex at their 3-positions
摘要:
Cyclobutanones bearing an alkyne-cobalt complex at their 3-positions reacted with aldehydes to give formal [4+2] cycloadducts by using tin(IV) chloride as a Lewis acid. Highly substituted tetrahydropyrone derivatives were stereoselectively prepared by this method. (C) 2011 Elsevier Ltd. All rights reserved.
Formal [4+2] cycloaddition of cyclobutanones bearing alkyne–cobalt complex at their 3-positions
摘要:
Cyclobutanones bearing an alkyne-cobalt complex at their 3-positions reacted with aldehydes to give formal [4+2] cycloadducts by using tin(IV) chloride as a Lewis acid. Highly substituted tetrahydropyrone derivatives were stereoselectively prepared by this method. (C) 2011 Elsevier Ltd. All rights reserved.
Cyclobutanones bearing an alkyne-cobalt complex at their 3-positions reacted with aldehydes to give formal [4+2] cycloadducts by using tin(IV) chloride as a Lewis acid. Highly substituted tetrahydropyrone derivatives were stereoselectively prepared by this method. (C) 2011 Elsevier Ltd. All rights reserved.