77599-17-8Relevant academic research and scientific papers
Highly regio- and stereo-selective carbometallation reaction of fluorine-containing internal acetylenes with organocopper reagents
Konno, Tsutomu,Daitoh, Takeshi,Noiri, Atsushi,Chae, Jungha,Ishihara, Takashi,Yamanaka, Hiroki
, p. 9391 - 9404 (2007/10/03)
The carbometallation reactions of fluoroalkylated internal alkynes with various organocopper reagents derived from organolithium, Grignard, and organozinc reagents were examined. All carbocupration reactions proceeded smoothly in a highly regio- and stereo-selective manner to give the corresponding vinylcopper intermediates. The intermediates reacted with H + smoothly, leading to the trisubstituted alkenes in high to excellent yields, whereas they reacted only with strictly limited carbon electrophiles such as allyl-, crotyl-, methallyl bromide, etc, probably due to the low reactivity exerted by an electron-withdrawing fluoroalkyl group. Treatment of vinylcopper with iodine resulted in a high yield of the corresponding vinyl iodide, which was employed successfully for Suzuki-Miyaura and Sonogashira cross-coupling reactions. In addition, two key reactions, the carbocupration and the Suzuki-Miyaura cross-coupling reaction realized the first highly stereoselective total synthesis of anti-estrogen drug, panomifene.
A highly stereoselective preparation of CF3-substituted 1-aryl-1,2-diphenylethenes: Application to the synthesis of panomifene
Kim, Myong Sang,Jeong, In Howa
, p. 3545 - 3548 (2007/10/03)
β-CF3-α,β-diphenylvinyl sulfide 3a was prepared stereoselectively in 77% yield from the reaction of 2 with phenyllithium at room temperature for 5 h. Oxidation of 3a with MCPBA afforded the corresponding vinyl sulfone 4a, in which (E)-4a can be
A highly regio- and stereoselective carbocupration of fluoroalkylated internal alkynes: A short total synthesis of the antiestrogenic drug panomifene
Konno, Tsutomu,Daitoh, Takeshi,Noiri, Atsushi,Chae, Jungha,Ishihara, Takashi,Yamanaka, Hiroki
, p. 933 - 936 (2007/10/03)
(Equation presented) A highly regio- and stereoselective carbometalation reaction of fluoroalkylated internal alkynes with organocopper reagents is described. This reaction is utilized successfully in the short, stereoselective total synthesis of the antiestrogenic drug panomifene.
A facile stereocontrolled approach to CF3-substituted triarylethenes: Synthesis of panomifene
Liu, Xinyu,Shimizu, Masaki,Hiyama, Tamejiro
, p. 879 - 882 (2007/10/03)
The stereoselective preparation and Pd-catalyzed cross-coupling reaction of boronates 2 provides a new general and convenient route to CF 3-substituted triaryl ethenes 3, in which the CF3 and Ar3 groups are cis to each other. The synthetic potential was demonstrated by the total synthesis of panomifene (Ar1 = Ar 3 = Ph, Ar2 = 4-(OHCH2CH2NHCH 2CH2O)-C6H4). Bpin = (pinacolato)boryl.
New practical synthesis of panomifene. The effect of 2-trifluoromethyl substituent on the stereoselectivity of dehydration of 1,1,2-triarylethanols
Nemeth, Gabor,Kapiller-Dezsofi, Rita,Lax, Gyoergyi,Simig, Gyula
, p. 12821 - 12830 (2007/10/03)
Highly stereoselective eliminations were achieved by acid-catalysed dehydration of 1-(4-alkoxy)-3,3,3-trifluoro-1,2-diphenylpropan-1-ols (10, 11, 15). The influence of the trifluoromethyl group on the stereochemistry of the elimination has been discussed. The observed high stereoselectivity has been applied to give a new, practical synthesis of antiestrogenic drug panomifene (1).
