Efficient and Selective Synthesis of <scp>d</scp>-<i>arabino</i>-, <scp>d</scp>-<i>lyxo</i>-, and <scp>d</scp>-<i>xylo</i>-Phytosphingosine from <scp>d</scp>-<i>ribo</i>-Phytosphingosine
作者:Sanghee Kim、Nakyong Lee、Sukjin Lee、Taeho Lee、Yun Mi Lee
DOI:10.1021/jo702147y
日期:2008.2.1
A new high-yield approach to the regio- and stereoselective synthesis Of D-arabino-, D-lyxo-, and D-xylo-phytosphingosines from inexpensive D-ribo-phytosphingosine is described. The synthetic methodologies mainly rely on the selective configurational inversion of the stereocenter through a neighboring group participation mechanism.
Nitrolaldol reaction of (R)-2,3-cyclohexylideneglyceraldehyde: a simple and stereoselective synthesis of the cytotoxic Pachastrissamine (Jaspine B)
作者:Prasad Vichare、Angshuman Chattopadhyay
DOI:10.1016/j.tetasy.2010.06.024
日期:2010.8
(R)-2,3-Cyclohexylideneglyceraldehyde 1 has been found to be a good substrate for nitroaldol reaction both in anhydrous and aqueous conditions. In both cases, the reaction took place with good substrate-controlled anti-selectivity. The major nitroaldol product 2b has been exploited to develop a simple and stereoselective synthesis of jaspine B X. Also, beginning with nitroaldol reaction of 1, this route presents a simple approach for the stereoselective preparation of (anti-anti-5,7)- and (syn-syn-9, 11, 12)-1,2,3,4-alkanetetrols, each possessing three contiguous oxygenated stereocenters. (C) 2010 Elsevier Ltd. All rights reserved.
A novel stereoselective synthesis of pachastrissamine (jaspine B) starting from 1-pentadecanol
作者:K. Venkatesan、K.V. Srinivasan
DOI:10.1016/j.tetasy.2007.12.001
日期:2008.2
A novel stereoselective synthesis of pachastrissamine (jaspine B), starting from commercially available 1-pentadecanol is described. Sharpless asymmetric dihydroxylation and a chelation controlled vinyl Grignard reaction are the key steps in this synthetic strategy. (C) 2007 Elsevier Ltd. All rights reserved.
SCHMIDT, RICHARD R.;MAIER, THOMAS, CARBOHYDR. RES., 174,(1988) 169-179