The Effect on DNA Cleavage Potency of Tethering a Simple Cyclic Enediyne to a Netropsin Analog
摘要:
The attachment of a simple 10-membered. monocyclic 3-ene-1,5-diyne to a derivative of netropsin via two-carbon (acetate) and four-carbon (crotonate) tethers enhances the DNA cleavage potency, by a factor of almost 2000 in the best case.
The esperamicin- calicheamicin aglycones: Ring closure of a simple strained system mediated by chromium(II)-nickel(II) salts
摘要:
2,6-Diyne-4-cyclodecen-1-ol, a highly simplified and isolable monocyclic analogue of the bicyclic aglycone of esperamicins and calicheamicins, has been obtained by an intramolecular cyclocondensation of 1-iodo-1,5-diyne-3-decen-10-al mediated by chromium(II)-nickel(II) salts.
Cyclic conjugated enediynes via elimination of a thionocarbonate in a latent Z-hex-3-ene-1,5-diyne unit
作者:M.F. Semmelhack、James Gallagher
DOI:10.1016/s0040-4039(00)60507-5
日期:1993.6
The common sugar dulcitol is transformed into a hex- 1,5-diyne with 3,4-dihydroxyls modified as an acetonide; this serves as a building block for the cyclic ene-diynes and allows mild and efficient introduction of the key ene unit at a late stage in ene-diyne synthesis using the reactive Corey-Winter reagent.