Zobrazeno 1 - 10
of 365
pro vyhledávání: '"William G. Dauben"'
Publikováno v:
Bioorganic & Medicinal Chemistry. 7:2937-2944
Endothal (1diacid) and [3H]cantharidic acid ([3H]CA) bind with high affinity to the catalytic subunit of protein phosphatase 2A (PP2A). PP2A in liver cytosol was greatly stabilized with 30% glycerol as a preliminary step in the potential use of endot
Publikováno v:
Tetrahedron Letters. 39:7079-7082
The synthesis of the basic tricyclic nucleus of the trinervitane diterpenes by means of the Robinson annelation and McMurry coupling is described.
Publikováno v:
The Journal of Organic Chemistry. 63:1379-1389
The Pauson−Khand reaction of cyclobutenes 3−5 with a variety of acetylenes yielded cis-anti cis-tricyclo[5.3.0.02,6]decanes 9−17. The unwanted regioisomers 9a and 10a were the sole products using acetylene, but there was a remarkable reversal i
Publikováno v:
The Journal of Organic Chemistry. 62:9005-9008
Two structural previtamin D3 analogues (R = H, CH3) cyclized photochemically with a 1.4−1.8-fold increase in quantum yields over a 3-nm change in excitation wavelength. The sudden increase in quantum yields is due to the participation and mixing of
Autor:
Xiaoming Zhang, William G. Dauben, Michael J. Luzzio, Shung C. Wu, Bipin Pandy, Robert T. Hendricks
Publikováno v:
Tetrahedron Letters. 36:2385-2388
Two efficient enantioselective syntheses of an A-ring precursor to 1 α,25-dihydroxyvitamin D3 have been developed. The key step in these sequences involves the stereoselective cyclopropanation of a chiral γ-alkoxy-α-diazo-β-keto ester. In one seq
Publikováno v:
Tetrahedron Letters. 35:2149-2152
Beginning with a steroid-5-ene, C/D-ring synthons of vitamin D are readily prepared via ozonization followed by a Norrish II photoelimination reaction.
Publikováno v:
ChemInform. 22
Montmorillonite clays catalyze the rearrangement of substituted allyl phenyl ethers to provide ortho -allyl phenols, chromans and coumarans under mild conditions.
Autor:
P. Koehler, William G. Dauben
Publikováno v:
ChemInform. 22
Autor:
A. S. Funhoff, R. R. Jun. Ollmann, S. S. Leung, J. E. Bishop, William G. Dauben, A. W. Norman
Publikováno v:
ChemInform. 23
Publikováno v:
ChemInform. 22