The first stereoselective total synthesis of (Z)-cryptomoscatone D2, a natural G2 checkpoint inhibitor
作者:Gandolla Chinna Reddy、Penagaluri Balasubramanyam、N. Salvanna、Thummala Sreenivasulu Reddy、Biswanath Das
DOI:10.1016/j.bmcl.2012.02.025
日期:2012.4
(Z)-cryptomoscatone D2, a naturally occurring G2 checkpoint inhibitor, was accomplished using propane-1,3-diol as the starting material. The Maruoka asymmetric allylation, ring closing metathesis and the hydrogenation of the triple bond employing Lindlar’s catalyst were involved as the key steps.
Studies toward the total synthesis of (+)‐neopeltolide using
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‐heterocyclic carbene‐catalyzed oxo‐acyloxylation/reductive oxa‐Michael addition strategy
作者:Rambabu N. Reddi、Arumugam Sudalai、Changbum Jo
DOI:10.1002/bkcs.12604
日期:2022.10
This article describes a concisesynthesis of two important fragments (tetrahydropyran [THP] and ketone moieties) of the cytotoxic macrolide (+)-neopeltolide in 10 long linear steps in enantiomerically pure form. Asymmetric Keck allylation to install the required C11 and C13 stereocenters, N-heterocyclic carbene (NHC)-catalyzed oxoacyloxylation to functionalize alkenes, and reductive oxa-Michael addition
The natural product L-783277 is a resorcylic lactone type covalent kinase inhibitor We prepared the 5'-deoxy analogue of L-783277 (1) in a stereoselective fashion. Remarkably, this analogue retains almost the full kinase inhibitory potential of natural L-783277, with low nanomolar IC50 values against the most sensitive kinases, and it exhibits essentially the same selectivity profile (within the panel of 39 kinases investigated). In contrast, removal of both the 4'- and the 5'-hydroxyl groups leads to a more significant reduction in kinase inhibitory activity and so does a change in the geometry of the C7'-C8' double bond in 1 from Z to E. These findings offer new perspectives for the design of second generation resorcylic lactone-based kinase inhibitors.
Efficient Stereoselective Total Synthesis of (+)-Cryptofolione and the First Synthesis of (-)-Cryptocaryalactone¹
The stereoselective syntheses of the naturally occurring α-pyrone derivatives (+)-cryptofolione and (-)-cryptocaryalactone were efficiently accomplished by using propane-1,3-diol as the starting material. Keck allylation, Mitsunobu center inversion, and olefin cross metathesis were used as the key steps. (-)-Cryptocaryalactone was synthesized here for the first time. total synthesis- lactones - natural