[2+ 2+ 2]??Cycloaddition of 4??Hydroxy??Substituted Enediynes to 2??Hydroxy??Substituted Decahydrophenanthrenes

~82%

~%

~%

~%

~%

~%

~%

~%

~77%

~%

~%

~%

~%

~%

~%

~%

~%

~73%

~%

~%

~%

~%

~%

~%

~%

~%

~%

~82%

~%

~%

~%

~%

~%

~%

~86%

~%