Studies toward the total synthesis of cyclodidemniserinol trisulfate. Part II: 3,5,7-Trisubstituted 6,8-dioxabicyclo [3.2.1] octane core structure construction via I2-mediated deprotection and ring closure tandem reaction
作者:Jian-Hua Liu、Ya-Qiu Long
DOI:10.1016/j.tetlet.2009.05.088
日期:2009.8
The 3,5,7-trisubstituted 6,8-dioxabicyclo [3.2.1] octane core structure was synthesized by employing a chiral pool convergent synthesis strategy and the I2-mediated simultaneous deprotection and ring closure reaction as the key step, providing a practical and efficient synthetic approach applicable to the further total synthesis of the natural product cyclodidemniserinol trisulfate.
The stereoselective totalsynthesis of a naturally occurring α‐pyrone (=2H‐pyran‐2‐one) derivative, synargentolide A (1), and of its epimer 2 (with the originally proposed structure of synargentolide A) was efficiently accomplished involving D‐tartaric acid as the starting material and an olefin cross‐metathesis reaction as the key step.