- 4-Phenylspiro[2.2]pentane-1,1-dicarboxylate: synthesis and reactions with EtAlCl2 and 4,5-diazaspiro[2.4]hept-4-ene derivative
-
Cyclopropanation of 1-methylidene-2-phenylcyclopropane with dimethyl diazomalonate affords new dimethyl 4-phenyl-spiro[2.2]pentane-1,1-dicarboxylate. On contact with EtAlCl2, this compound undergoes opening of both cyclopropane rings to give dimethyl (2-chloromethyl-3-phenylallyl)malonate. Its EtAlCl2-assisted reaction with methyl 5′-methylspiro[cyclo-propane-1,3′-pyrazoline]-5′-carboxylate proceeds as the 1,3:1′,5′-addition to afford mainly 3-(2-chloroethyl)-1-cyclo-propylmethyl-1H-pyrazoline derivative.
- Denisov, Dmitry A.,Borisov, Denis D.,Potapov, Konstantin V.,Novikov, Roman A.,Tomilov, Yury V.
-
p. 417 - 418
(2019/08/20)
-
- Bromine radical-mediated sequential radical rearrangement and addition reaction of alkylidenecyclopropanes
-
Bromine radical-mediated cyclopropylcarbinyl-homoallyl rearrangement of alkylidenecyclopropanes was effectively accomplished by C-C bond formation with allylic bromides, which led to the syntheses of 2-bromo-1,6-dienes. A three-component coupling reaction
- Kippo, Takashi,Hamaoka, Kanako,Ryu, Ilhyong
-
supporting information
p. 632 - 635
(2013/03/14)
-
- Pd-catalyzed ring-opening copolymerization of 2-aryl-1-methylenecyclopropanes with CO to afford polyketones via alternating insertion of the two monomers and C - C bond activation of the three-membered ring
-
Pd-bpy complexes catalyze the ring-opening copolymerization of 2-aryl-1-methylenecyclopropanes with CO, affording the new polyketones composed of ring-opened structural units only. Kinetic and isotope-labeling studies revealed the mechanism of the reactio
- Kim, Sunwook,Takeuchi, Daisuke,Osakada, Kohtaro
-
p. 762 - 763
(2007/10/03)
-
- Ni-complex-catalysed addition polymerisation of 2-phenyl-1-methylenecylopropane to afford a polymer with cyclopropylidene groups
-
π-Allyl-nickel complexes initiated addition polymerisation of 2-phenyl-1-methylenecyclopropane to give a polymer with three-membered rings; the formed polymer showed a high Tg and negligible thermal decomposition up to 300°C.
- Takeuchi, Daisuke,Osakada, Kohtaro
-
p. 646 - 647
(2007/10/03)
-