Zobrazeno 1 - 10
of 168
pro vyhledávání: '"G. D. Meakins"'
Publikováno v:
ChemInform. 22
Publikováno v:
ChemInform. 23
Reexamination of previous work and new studies show that the reactions of 2-aminothiazoles with (heterocyclic) aromatic aldehydes are not straightforward; there are wide divergencies in behaviour between the various amine-aldehyde pairs. Simple effic
Publikováno v:
ChemInform. 24
Publikováno v:
Synthesis. 1991:621-624
Reexamination of previous work and new studies show that the reactions of 2-aminothiazoles with (heterocyclic) aromatic aldehydes are not straightforward; there are wide divergencies in behaviour between the various amine-aldehyde pairs. Simple effic
Publikováno v:
J. Chem. Soc. C. :2674-2682
Twenty-eight vicinal cholestanediols (positions 1,2; 2,3; 3,4; 4,5; 5,6; 6,7; and 7,8) have been prepared by unambiguous routes starting from the corresponding olefins. The O–H stretching bands of dilute solutions of these diols and of seven refere
Autor:
P. C. Cherry, J. E. Bridgeman, G. D. Meakins, V. Kumar, E. E. Richards, Y. Morisawa, A. S. Clegg, J. M. Evans, Ewart R. H. Jones, A. Kasal, P. D. Woodgate
Publikováno v:
J. Chem. Soc. C. :250-257
Structural investigation of the products obtained by microbiological hydroxylation of substrates in the androstane, pregnane, and œstrane series has involved examining the 1H n.m.r. spectra of 344 steroids, 243 of them being new compounds. Mild oxid
Publikováno v:
J. Chem. Soc. C. :2841-2844
O-Substituted glycollic esters (R1O·CH2·CO2R2) are readily prepared by treating hydroxy-steroids (R 1OH) with alkyl diazoacetates in the presence of fluoroboric acid.
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :499-502
The following new compounds have been prepared: 2α-, 4α-, 4β-, 6β- and12α-hydroxy-5α-androstanes; the acetates of these alcohols and of the 1α-, 1β-, 2β-, 6α-, 12β-, 15α- and 15β-hydroxy-5α-androstanes; 3α- and 3β-hydroxy-5α-androst-
Autor:
G. D. Meakins, I. M. Clark, A. M. Bell, P. D. Woodgate, William A. Denny, P. C. Cherry, Ewart R. H. Jones
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :2081-2095
Dioxygenated 5α-androstanes are more readily hydroxylated with Calonectria decora than the mono-oxygenated substrates studied previously. Oxygen functions in rings A and D act as primary directing groups and, when a blocking effect by middle ring su
Publikováno v:
J. Chem. Soc. C. :2300-2305
The four 5α-androstane-16,17-diols, the two 17-oxo-5α-androstan-16-yl acetates, and 16-oxo-5α-androstan-17β-yl acetate have been prepared. Chemical transformations, together with i.r. and n.m.r. results, establish the structures of these compound