Toward the Total Synthesis of Bryostatin 11: Stereoselective Construction of the C13-Exocyclic Enoate in the C1–C16 Fragment
摘要:
We have utilized a spiroketal template in an approach to the C1-C16 fragment of bryostatin. The stereoselective construction of an exocyclic enoate at C13 and insertion of a vinyl group on C15 were accomplished by using Peterson-Yamamoto olefination and copper-catalyzed addition of vinyl magnesium bromide, respectively.
Na-Y zeolite, an efficient catalyst for the methoxymethylation of alcohols
作者:Pradeep Kumar、Satya V.N. Raju、Ravinder S. Reddy、Bipin Pandey
DOI:10.1016/0040-4039(94)88046-8
日期:1994.2
A variety of hydroxy compounds react with methoxymethyl chloride in the presence of catalytic amount of Na-Yzeolite to afford the corresponding methoxymethyl ethers (MOM ethers) in excellent yields.
The righthalf of (+)-pederin was synthesized through a convenient and efficient asymmetric synthesis in 14 steps with 8.3% overall yield. The key step was an iodine-induced heterocyclization to construct the pyran ring. The chiral centers were constructed separately via asymmetric allylation, substrate-controlled diastereoselective reactions, and Sharpless asymmetric dihydroxylation.
Methods for the interconversion of protective groups. Transformation of mem ethers into isopropylthiomethyl ethers or cyanomethyl ethers
作者:E.J. Corey、Duy H. Hua、Steven P. Seitz
DOI:10.1016/s0040-4039(01)91133-5
日期:1984.1
Toward the Total Synthesis of Bryostatin 11: Stereoselective Construction of the C13-Exocyclic Enoate in the C1–C16 Fragment
作者:Kyoko Nakagawa-Goto、Michael T. Crimmins
DOI:10.1080/00397911.2010.516462
日期:2011.10.15
We have utilized a spiroketal template in an approach to the C1-C16 fragment of bryostatin. The stereoselective construction of an exocyclic enoate at C13 and insertion of a vinyl group on C15 were accomplished by using Peterson-Yamamoto olefination and copper-catalyzed addition of vinyl magnesium bromide, respectively.