Palladium-Catalyzed Enantioselective Cyclization of Silyloxy-1,6-Enynes
作者:Britton K. Corkey、F. Dean Toste
DOI:10.1021/ja068723r
日期:2007.3.1
Binaphane−Pd(II) complexes as catalysts for the formation of methylene cyclopentane adducts from 1,6-enyne precursors. The utility of this reaction is illustrated by its application to the totalsynthesis of the cytotoxic cyclolaurane-type sesquiterpene, (−)-laurebiphenyl.
Aminocarbene Complexes of Chromium. 8. Access to the Pyrroloindole and Pyrrolochinoline Frameworks and Synthesis of Substituted Lycoranes
作者:Cécile Bouaucheau、Andrée Parlier、Henri Rudler
DOI:10.1021/jo970720x
日期:1997.10.1
The use of alkynylaminocarbene complexes of chromium as starting material for the synthesis of pyrroloindole, pyrrolochinoline, and azaacenaphtylenone skeletons via cascade insertions of alkynes and CO followed by the rearrangement of zwitterionic intermediates was examined. Both the precursor complexes, synthesized from the appropriate functionalized lactams, as well as their thermolysis products
Structural-based design and synthesis of novel 9-deazaguanine derivatives having a phosphate mimic as multi-substrate analogue inhibitors for mammalian PNPs
9-(5',5'-Difluoro-5'-phosphonopentyl)-9-deazaguanine (DFPP-DG) was designed as a multi-substrate analogue inhibitor against purine nucleoside phosphorylase (PNP) on the basis of X-ray crystallographic data obtained for a binary complex of 9-(5',5'-difluoro-5'-phosphonopentyl)guanine (DFPP-G) with calf-spleen PNP. DFPP-DG and its analogous compounds were synthesized by the Sonogashira coupling reaction between a 9-deaza-9-iodoguanine derivative and omega-alkynyldifluoromethylene phosphonates as a key reaction. The experimental details focused on the synthetic chemistry along with some insights into the physical and biological properties of newly synthesized DFPP-DG derivatives are disclosed. (C) 2010 Elsevier Ltd. All rights reserved.