75154-95-9Relevant articles and documents
Thermal -Sigmatropic Hydrogen Shifts: Stereochemistry, Kinetics, Isotope Effects, and ?-Facial Selectivity
Hoeger, Carl A.,Johnston, Allen D.,Okamura, William H.
, p. 4690 - 4698 (2007/10/02)
The antarafacial stereochemistry of the thermal -sigmatropic hydrogen shift has been demonstrated.The substrates studied include the epimeric cis-isotachysterol analogues 1 and 4 and their stereospecifically 15α-deuterium-labelled derivatives 7 and 1
Studies on Vitamin D (Calciferol) and Its Analogues. 18. The Vinylallene Approach to the 1-Hydroxyvitamin D System. New Sigmatropic Reactions in the Vitamin D Series
Condran, Patrick,Hammond, Milton L.,Mourino, Antonio,Okamura, William H.
, p. 6259 - 6267 (2007/10/02)
The thermally induced -sigmatropic hydrogen shift of the diastereomeric vitamin D type vinylallenols 6a (1R,6R), 6b (1R,6S), 7a (1S,6S) and vinylallenols 5a (6R) and 5b (6S) were studied.The 1S,6S (7b) and 1R,6R(6a) alcohols afforded ca. 60percent yi