Kedarcidin Chromophore: Synthesis of Its Proposed Structure and Evidence for a Stereochemical Revision
作者:Feng Ren、Philip C. Hogan、Alan J. Anderson、Andrew G. Myers
DOI:10.1021/ja071205b
日期:2007.5.1
enantioselective synthesis of the proposed structure of kedarcidinchromophore (1) is described. The route is 24 steps in the longest linear sequence (beginning with the commercial reagent 2,3-O-isopropylidene-d-erythronolactone) with an average yield of 75% per step (overall yield: 0.1%). Our 1H NMR data for 1 do not coincide with the data reported for kedarcidinchromophore. We have re-analyzed the original
The synthesis of L-()-mycarose and L-()-cladinose
作者:D.M. Lemal、P.D. Pacht、R.B. Woodward
DOI:10.1016/0040-4020(62)80009-x
日期:1962.1
Synthesis of cladinose from mycarose and synthesis of the same methylated derivative, 3,4-di-O-methylmycarose, from both mycarose and cladinose demonstrated the configurational identity of the two sugars. The synthesis of dl-mycarose and its 3-epimer by methods which reveal their configurations is described. Synthetic racemic mycarose was resolved via its bornanol-10-sulfonates and the active synthetic