An expedient total synthesis of optically active piperidine and indolizidine alkaloids (−)-β-conhydrine and (−)-lentiginosine
作者:Ahmed Kamal、Saidi Reddy Vangala
DOI:10.1016/j.tet.2010.11.011
日期:2011.2
Attempts directed toward the stereocontroled total synthesis of piperidine and indolizidine alkaloids resulted in the synthesis of (−)-β-conhydrine 1 and (−)-lentiginosine 3. The synthesis of 1 and 3 were developed from protected d-mannitol as the chiral precursor, which involved nucleophilic addition and azide nucleophilic substitution, Barbier allylation, ring closing metathesis, and Sharpless asymmetric
Diversity-Oriented Synthesis of Carbohydrate Scaffolds through the Prins Cyclization of Differently Protected<scp>d</scp>-Mannitol-Derived Homoallylic Alcohols
作者:Sateesh Dubbu、Yashwant D. Vankar
DOI:10.1002/ejoc.201701172
日期:2017.11.2
scaffolds such as sugar fused isochroman derivatives, bicyclic vinyl halide derivatives, fluorine substituted tetrahydropyrans, and a furan derivative is reported. This has been achieved by using the Prins reaction on D-mannitol derived homoallylic alcohols in which the allylic alcohol is differently protected and that causes structural variations in products. Some of the products have also been converted
Total synthesis of phytotoxic herbarumin-I from d-mannitol
作者:Ahmed Kamal、P. Venkat Reddy、S. Prabhakar
DOI:10.1016/j.tetasy.2009.03.039
日期:2009.6
A simple carbohydrate-based convergent approach towards the totalsynthesis of herbarumin-I, a 10-membered lactone is described. The key features of the synthetic strategy include Grignard reaction and ring-closing metathesis reaction for the formation of the 10-membered ring and E-olefinic moiety. d-Mannitol has been used as a chiral pool material for the construction of the key fragment.
highly convergent, stereoselective total synthesis of a ten-membered lactone, stagonolide G, is described. Epoxide ring-opening with vinyl Grignard, Yamaguchi esterification and ring-closing metathesis are the key steps involved in the present approach. d-Mannitol was used as a chiral pool material for the construction of both of the key fragments - the olefinic acid and the olefinic alcohol moieties. chiral
Synthesis of Aminocyclitols and Trihydroxylated Indolizidinone from a D-Mannitol-Derived Common Building Block
作者:Preeti Gupta、A. P. John Pal、Y. Suman Reddy、Yashwant D. Vankar
DOI:10.1002/ejoc.201001171
日期:2011.2
The synthesis of 4-amino-4-deoxy-muco-quercitol (22), 4-amino-4-deoxy-(-)-vibo-quercitol (27) and also a trihydroxylatedindolizidinone 38 from D-mannitol is described using ring-closing metathesis and diastereoselective dihydroxylation as the key steps.