14949-45-2Relevant academic research and scientific papers
First isolation and characterization of 1,2-oxaphosphetanes with three phenyl groups at the phosphorus atom in typical Wittig reaction using cyclopropylidenetriphenylphosphorane
Hamaguchi, Masashi,Iyama, Yuji,Mochizuki, Eiko,Oshima, Takumi
, p. 8949 - 8952 (2007/10/03)
1,2-Oxaphosphetanes bearing three phenyl groups directly bound to the phosphorus atom were successfully isolated for the first time as stable crystals in the typical Wittig reaction of cyclopropylidenetriphenylphosphorane with activated carbonyl compounds. X-ray analysis of the oxaphosphetane showed that the phosphorus atom is at the center of a slightly distorted trigonal bipyramidal structure. Thermal decomposition of these oxaphosphetanes was carried out to give the starting carbonyl compounds and Wittig reaction products, olefins.
Reaction of Vinylphosphonium Salts with Sulfoxonium Ylides. Synthesis of Cyclopropylphosphonium Salts
Okuma, Kentaro,Ikari, Komei,Ono, Masaaki,Sato, Yasunari,Kuge, Seiji,et al.
, p. 2313 - 2318 (2007/10/03)
Reactions of (dimethylamino)phenylsulfoxonium mathylide with triphenylvinylphosphonium salts gave the corresponding cyclopropyltriphenylphosphonium salts (E-form) in high yields, when 1,8-diazabicycloundec-7-ene was used as a base.Reactions of cyclopropyltriphenylphosphonium salts with sodium hydride in the presence of trisamine afforded the corresponding ylides, which further reacted with aldehydes to give alkylidenepropanes in high yields.
DOUBLE CROTONIC CONDENSATION OF 1,1-BISACYCLOPROPANES UNDER THE CONDITIONS OF THE WITTIG REACTION. SIMPLE SYNTHESIS OF SPIROCYCLOPROPANECYCLOOCTATRIENONES
Zefirov, N. S.,Kuznetsova, T. S.,Kozhushkov, S. I.,Kokoreva, O. V.
, p. 648 - 651 (2007/10/02)
The reaction of 1,1-diacyclopropanes with methylenephosphorane in the presence of dimsylsodium in DMSO leads to 1,1-bisalkenyl- and 1,1-alkenylacylcyclopropanes, depending on the ratio of the reagents.In the case of cyclopropylidenephosphorane it leads exclusively to spirocyclopropanecyclooctatrienes.
