Synthesis of Optically Active β,γ-Unsaturated α-Amino Acids and of α,β-Unsaturated γ-Amino Acids. SN2- vs. SN2’-Dichotomy of the Mitsunobu Amination of Allylic Alcohols
Synthesis of Optically Active β,γ-Unsaturated α-Amino Acids and of α,β-Unsaturated γ-Amino Acids. SN2- vs. SN2’-Dichotomy of the Mitsunobu Amination of Allylic Alcohols
(<i>R</i>)-2,3-Cyclohexylideneglyceraldehyde, a Chiral Pool Synthon for the Synthesis of 2-Azido-1,3-diols
作者:Abdul Rouf、Mushtaq A. Aga、Brijesh Kumar、Subhash C. Taneja
DOI:10.1002/hlca.201400344
日期:2015.6
A new approach was proposed for the synthesis of 2‐azido‐1,3‐diols from easily available and inexpensive chiralpool synthon (R)‐2,3‐O‐cyclohexylidene‐D‐glyceraldehyde, through Mitsunobu azidation of 1,2‐diols. Both C(2) and C(1) azides in variable ratios were obtained in alkyl substituted diols with C(2) as the major one.
Eu(OTf)<sub>3</sub>-Catalyzed Highly Regioselective Nucleophilic Ring Opening of 2,3-Epoxy Alcohols: An Efficient Entry to 3-Substituted 1,2-Diol Derivatives
In our study of the totalsynthesis of (+)-irciniastatin A, we found a need to develop a method that enables a C3-selective nucleophilicringopening of 2,3-epoxyalcohol by MeOH, by which we found that the use of combined catalytic amounts of Eu(OTf)3 and 2,6-di-tert-butyl-4-methylpyridine (DTBMP) enables the intended transformation to obtain 3-methoxy-1,2-diol efficiently. Promising features of a
A stereocontrolled synthetic route to the C1C18 subunit of pamamycin-607
作者:Sung Ho Kang、Joon Won Jeong
DOI:10.1016/s0040-4039(02)00655-x
日期:2002.5
The C1 C18 subunit 2 of the 16-membered macrodiolide pamamycin-607 has been synthesized stereo selectively using the Ag2CO3-mediated intramolecular iodoetherification for the two cis-2,5-disubstituted tetrahydrofurans, crotylation and cuprate epoxide opening for the hydroxyl and methyl substituents. (C) 2002 Elsevier Science Ltd. All rights reserved.