64566-40-1Relevant academic research and scientific papers
[3+3] cyclodimerization of methylenecyclopropanes: Stoichiometric and catalytic reactions of Nickel(0) with electron-deficient alkylidenecyclopropanes
Ohashi, Masato,Taniguchi, Tomoaki,Ogoshi, Sensuke
scheme or table, p. 2386 - 2389 (2010/08/05)
Stoichiometric treatment of Ni(cod)2 with ethyl cyclopropylideneacetate (ECPA) in the presence of PCy3 resulted in an unpredicted formation of a Ni(0) complex bearing an (E,E)-1,2-bis(exo- alkylidene)cyclohexane ligand, which stemmed from the [3 + 3] cyclodimerization of ECPA. The reaction could be expanded to a Ni(0)-catalyzed [3 + 3] cyclodimerization reaction of ester-substituted methylenecyclopropanes, giving the corresponding cyclohexane derivatives in excellent yields.
A convenient method for the synthesis of 2,5-difunctionalized phospholes bearing ester groups
Matano, Yoshihiro,Miyajima, Tooru,Nakabuchi, Takashi,Matsutani, Yuichiro,Imahori, Hiroshi
, p. 5792 - 5795 (2007/10/03)
Symmetrically and unsymmetrically 2,5-difunctionalized phospholes bearing ester groups were prepared in a one-pot procedure from the corresponding diynes and dichloro(phenyl)phosphine via titanacyclopentadienes. The observed optical properties of the func
Nickel(0)-catalyzed dimerization of ethyl cyclopropylideneacetates
Kawasaki, Taishi,Saito, Shinichi,Yamamoto, Yoshinori
, p. 4911 - 4915 (2007/10/03)
The dimerization of ethyl cyclopropylideneacetates proceeded in the presence of Ni(0) catalysts, and cyclic compounds or linear compounds were formed in selective manners. The structures of products were highly dependent on the structure of the substrate
Nickel(0)-promoted Synthesis of Tetralin Lactones from the Co-cyclisation of Monoynes and Octa-1,7-diynes Terminally Substituted with Ester or Amide Groups
Bhatarah, Parveen,Smith, Edward H.
, p. 2163 - 2168 (2007/10/02)
The co-cyclisation of octa-1,7-diynes with a variety of monoynes mediated by nickel(0) requires ester or amide groups at the terminal positions of the diyne and is subject to steric hindrance about the diyne rather than the monoyne; fused tetralin lactones are the most common products obtained in moderate to good yields.Intramolecular cyclisation of two triynes to the same type of product gives superior yields.
