Transformation of cyclohexene to enantiopure cyclitols mediated by sequential oxyselenenylation with (S,S)-hydrobenzoin: synthesis of d-chiro-inositol and muco-quercitol
作者:Kwan Soo Kim、Jong Il Park、Hoi Kyung Moon、Hann Yi
DOI:10.1039/a804072i
日期:——
Oxyselenenylation of cyclohexene with (S,S)-hydrobenzoin and subsequent oxidation-elimination allows isolation of an allylic ether in which further phenylselenenylation is completely regioselective, thus allowing entry to the cyclitols D-chiro-inositol and muco-quercitol.
Stereoselective synthesis of muco-quercitol, (+)-gala-quercitol and 5-amino-5-deoxy-d-vibo-quercitol from d-mannitol
作者:Venkata Ramana Doddi、Amit Kumar、Yashwant D. Vankar
DOI:10.1016/j.tet.2008.06.107
日期:2008.9
Synthesis of muco-quercitol, (+)-gala-quercitol, and 5-amino-5-deoxy-d-vibo-quercitol is described fromd-mannitol using ring closing metathesis and diastereoselective dihydroxylations as key steps.
Synthesis of enantiopure cyclitols from (±)-3-bromocyclohexene mediated by intramolecular oxyselenenylation employing (S,S)-hydrobenzoin and (S)-mandelic acid as chiral sources
作者:Yong Joo Lee、Kyunghoon Lee、Sea Ill Jung、Heung Bae Jeon、Kwan Soo Kim
DOI:10.1016/j.tet.2005.01.003
日期:2005.2
Reaction of 3-bromocyclohexene with (SS)-hydrobenzoin and (S)-mandelic acid and subsequent intramolecular oxyselenenylation of the resulting allylic ethers followed by oxidation-elimination afforded the valuable cis-fused bicyclic olefins, (1S,3S,4S,6R)-3,4-diphenylbicyclo[4,4,0]-2,5-dioxa-7-decene and (1S,3S,4R)-3-phenyl-4a,7,8,8a-tetrahydro-benzo[1,4]dioxan-2-one, respectively. Further stereoselective transformation of these cis-fused bicyclic olefins afforded the enantiopure cyclohexitols, muco-quercitol, D-chiro-inocitol and allo-inocitol. (C) 2005 Elsevier Ltd. All rights reserved.
Epoxidation of Protected (1,4,5)‐Cyclohex‐2‐ene‐triols and Their Acid Hydrolysis to Synthesize Quercitols from<scp>D</scp>‐(−)‐Quinic Acid
作者:Tzenge‐Lien Shih、Ya‐Ling Lin
DOI:10.1081/scc-200063960
日期:2005.7
Highly stereoselective epoxidations have been achieved in both cyclohexylidene acetal and butane 2,3-bisacetal (BBA) protection of (1,4,5)-cyclohex-2-ene-triols. These epoxy derivatives are all derived from D-(-)-quinic acid and can be used for the synthesis of muco-, (+)-epi-, (+)-vibo,(-)- talo, and (-) (-)-gala-quercitols.