Phyllanthoside-Phyllanthostatin synthetic studies. 6. An augmented spiroketalization tactic for the total synthesis of phyllanthocin
作者:Amos B. Smith、James R. Empfield、Henry A. Vaccaro
DOI:10.1016/s0040-4039(00)70688-5
日期:1989.1
An enhanced spiroketalization maneuver permitting equilibration at both the C(8) and C(11) centers of spiroketals 17a,b leads to a more concise and efficient synthesis of phyllanthocin (i.e., 21 steps, 5.6% overall yield).
作者:Steven D. Burke、Jeffery J. Letourneau、Mark A. Matulenko
DOI:10.1016/s0040-4039(98)80004-x
日期:1999.1
The totalsynthesis of (+)-breynolide (2) is described. The primary focus is the synthesis of the advanced aldehyde intermediate 12, which comprises the cis-fused perhydrobenzothiophene ring system. Three stereoselective cyclohexene epoxidation/epoxide opening sequences and a glycolate ester Claisen rearrangement, by which all of the necessary oxygen functionality in 12 is introduced before installation