Regulation of equilibria in the catalytic asymmetric allylic transfer reaction: unusual 1,2-carbonyl addition of 3-trimethylsilyl-2-propenylstannaneElectronic supplementary information (ESI) available: experimental details. See http://www.rsc.org/suppdata/cc/b3/b304356h/
Preparation of γ-trimethylsilylallyldibutylstannane grafted on solid support: a clean and easily recyclable reagent for the synthesis of 2,6-disubstituted dihydropyrans
annane grafted on an insoluble macroporous polymer is reported. This bimetallic reagent was treated with aldehydes in the presence of indium trichloride to afford in good yields both symmetrical and unsymmetrical cis-2,6-disubstituted dihydropyrans, practically uncontaminated with organotin residues (less than 20 ppm). The potential for regeneration and reuse of this supported bimetallic reagent is
Cycloheptyne–cobalt complexes via allylation of stabilized γ-carbonyl cations
作者:James R. Green
DOI:10.1039/a803316a
日期:——
The Bu2BOTf mediated reaction of stannylsilanes (5 and 9) with γ-methoxy-alkynoate and -alkynone hexacarbonyldicobalt complexes (8), followed by conversion of the organic carbonyl into an acetate and a BF3·OEt2 mediated intramolecular reaction, affords cycloheptenyne hexacarbonyldicobalt complexes (13 and 15).
A Convergent Synthesis of the Macrocyclic Core of Cytotrienins: Application of RCM for Macrocyclization
作者:Gwilherm Evano、Jennifer V. Schaus、James S. Panek
DOI:10.1021/ol036284k
日期:2004.2.1
[reaction: see text] The asymmetric synthesis of the fully elaborated macrocyclic core of cytotrienins A-D, potent apoptosis-inducing agents, is described. Synthetic highlights include the construction of the aniline bond using a copper-mediated amidation and the use of a ring-closing metathesis (RCM) reaction to efficiently install the (E,E,E)-triene and simultaneously construct the macrocyclic lactam
4 + 3 and fluorinative 4 + 3 cycloadditions of alkyne 1,4-diether dicobalt complexes
作者:Manoj M. Patel、James R. Green
DOI:10.1039/a809641d
日期:——
The BF3·OEt2 mediated reactions between alkynyl diether hexacarbonyldicobalt complexes 1 and stannylsilanes 3 or 7 afford cycloheptenyne cobalt complexes 4 or fluorocycloheptyne complexes 8 depending upon the conditions of reaction.
Synthesis of 2-<i>epi</i>-Amphidinolide E: An Unexpected and Highly Selective C(2) Inversion during an Esterification Reaction
作者:Porino Va、William R. Roush
DOI:10.1021/ol0628098
日期:2007.1.1
A synthesis of 2-epi-amphidinolide E (1) has been accomplished via an unexpected and highly diastereoselective C(2) stereochemical inversion during the modified Yamaguchi esterification of alcohol 4b and Fe(CO)3-complexed dienoic acid 7. [reaction: see text].