Reactions of bicyclobutylidene and 1,3-bis(trimethylene)propadiene
作者:Lim Keow Bee、John W. Everett、Peter J. Garratt
DOI:10.1016/0040-4020(77)80330-x
日期:——
A number of reactions of bicyclobutylidene (1) and 1,3-bis(trimethylene)propadiene (2), directed towards the preparation of compounds in which conjugated and steric effects of the cyclobutane ring could be evaluated, are described. Trispiro[3.0.3.0.2.0] undecane (4) was prepared from 1, and 1-cyclobutylidenespiro[3.2]hexane (8b) from 2. Thermolysis of 8b gave 9-methylenedispiro[3.0.3.1]nonane (14)
6,7-Dimethylene-3-thiabicyclo[3.2.0]heptane-3,3-dioxide, a masked form of [4]dendralene and conjunctive reagent for tandem annelations
作者:Caroline M. Buchan、J. I. G. Cadogan、Ian Gosney、William J. Henry
DOI:10.1039/c39850001785
日期:——
Previous limitations of highly reactive [4]dendralene [3,4-dimethylenehexa-1,5-diene (1)] as a tandem annelating reagent in Diels–Alder reactions are overcome by use of its maskedform, 6,7-dimethylene-3-thiabicyclo[3.2.0]-heptane-3,3dioxide (2), and subsequent extrusion of SO2 under flash vaccum pyrolytic conditions.
Synthesis and Diels–Alder Reactivity of Substituted [4]Dendralenes
作者:Mehmet F. Saglam、Ali R. Alborzi、Alan D. Payne、Anthony C. Willis、Michael N. Paddon-Row、Michael S. Sherburn
DOI:10.1021/acs.joc.5b02583
日期:2016.2.19
The first synthesis of all five possible monomethylated [4]dendralenes has been achieved via two distinct synthetic strategies. The Diels–Alder chemistry of these new dendralenes (as multidienes) with an electron poor dienophile, N-methylmaleimide (NMM), has been studied. Thus, simply upon mixing the dendralene and an excess of dienophile at ambient temperature in a common solvent, sequences of cycloadditions
Synthesis and Applications of Tricarbonyliron Complexes of Dendralenes
作者:Henry Toombs-Ruane、Nik Osinski、Thomas Fallon、Cindy Wills、Anthony C. Willis、Michael N. Paddon-Row、Michael S. Sherburn
DOI:10.1002/asia.201100455
日期:2011.12.2
[3]Dendralene and [4]dendralene are converted smoothly into tricarbonyliron complexes. The structures of four complexes analyzed by DFT and single‐crystal X‐ray analysis show that, in contrast to free hydrocarbons, complexed dendralenes prefer a roughly in‐plane conformation. The complexes are stable towards Fe(CO)3 group migration up to 150 °C. The synthetic value of Fe(CO)3 complexation in the dendralene
Domino Cycloaddition Organocascades of Dendralenes
作者:Nicholas J. Green、Andrew L. Lawrence、Gomotsang Bojase、Anthony C. Willis、Michael N. Paddon-Row、Michael S. Sherburn
DOI:10.1002/anie.201302185
日期:2013.8.5
Hooray Horeau! Highly enantioselective organocatalyzed Diels–Alder reaction cascades are disclosed for the first time. The reaction enables the efficient and rapid construction of enantiopure polycycles from simple achiral, acyclic polyenes.