Convergent One-Pot Oxidative [<i>n</i>+ 1] Approaches to Spiroacetal Synthesis
作者:GuangRong Peh、Paul E. Floreancig
DOI:10.1021/acs.orglett.5b01736
日期:2015.8.7
Two one-pot oxidative annulative approaches to spiroacetal synthesis are described. One approach uses a Lewis acid mediated Ferrier reaction in the fragment-coupling stage followed by DDQ-promoted oxidative carbon-hydrogen bond cleavage and cyclization. An alternative approach employs a Heck reaction for fragment coupling followed by DDQ-mediated enone formation and cyclization. These strategies provide convergent routes to common subunits in natural products, medicinal agents, and chemical libraries under mild reaction conditions.