Tetrahedron Letters p. 3021 - 3024 (1988)
Update date:2022-08-28
Topics:
Dauben, William G.
Kowalczyk, Bruce A.
Funhoff, Dirk J. H.
The interconversion of previtamin D3 and vitamin D3 at 20 deg C was effected at high pressure (15 kbar) in three solvent mixtures.The rate constants of k1 and k2 were determined to be 30 to 45 times larger than the corresponding 1 bar rate constants.The ΔV* was calculated to be -5.14 cm3/mol or lower, indicating a concerted <1,7> sigmatropic hydrogen shift.
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