Ring expansion and cleavage of succinoin derivatives. Geminal acylation, reductive succinoylation, and stereoselective spiro annelation methods

~90%

~67%

~83%

~%

~%

~%

~%

~28%

~75%

~88%

~%

~93%

~79%

~96%

~%

~68%

~%

~%

~%

~%

~%

~%

~92%

~78%

~68%

~%

~%

~70%

~52%

~75%

~95%

~91%

~%

~87%

~89%

~85%

~%

~%

~92%

~%

~%

~63%

~%

~79%

~92%

~82%

~51%

~82%

~%

~%

~%

~65%

~%

~%

~%

~84%

~92%

~28%

~%