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Nor-squalen
Publications associées (41)
Phosphor-Betaine als Wittig-Zwischenstufen : Es gibt sie doch !
Phosphorus ylides combine with carbonyl compds. to give zwitterionic betaines as detectable intermediates of the Wittig reaction, provided that the neg. charge on the O atom was substantially reduced by binding to a Li cation or resonance delocalization in ...
1977Fluorchlorcyclopropane : ihre Darstellung und Abwandlung
Reaction of olefins with CHCl2F and BuLi gave stereospecifically the cis and trans isomers of 2-R1, 2-R3, 3-R2, 3-R4 = tetrasubstituted 1-chloro-1-fluorocyclopropanes (I) (R1 = H, Me; R2 = H, Me, Pr; R3 = Me, Pr, Ph, amyl, OEt, OBu-iso; R4 = H, Me, Pr), wh ...
1971Die Zersetzung von Diazoverbindungen in Gegenwart von Triphenylphosphin
cf. CA 55, 23400c. The Cu salt decompn. of diazo compds. in the presence of Ph3P opens up a new path to the synthesis of phosphorus-ylides. Ph3P (10 millimoles) and 10 millimoles 0.6M CH2N2 in Et2O treated 15 min. with 1 millimole anhyd. CuCl in 70 ml. tet ...
1962