Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Timothy M. Ramsey"'
Autor:
Stuart J. Mickel, Gottfried H. Sedelmeier, Daniel Niederer, Friedrich Schuerch, Guido Koch, E. Kuesters, Robert Daeffler, Adnan Osmani, Manuela Seeger-Weibel, E. Schmid, Alfred Hirni, Karl Schaer, Remo Gamboni, Andrew Bach, Stephen Chen, Weichun Chen, Peng Geng, Christopher T. Jagoe, Frederick R. Kinder, George T. Lee, Joseph McKenna, Timothy M. Ramsey, Oljan Repič, Larry Rogers, Wen-Chung Shieh, Run-Ming Wang, Liladhar Waykole
Publikováno v:
Organic Process Research & Development. 8:107-112
Publikováno v:
Journal of the American Chemical Society. 120:9139-9148
The preparation and examination of 3−7 are detailed and constitute analogues of deglycobleomycin A2 (2) containing systematic modifications in the l-threonine side chain. The studies revealed a sub...
Publikováno v:
Journal of the American Chemical Society. 120:9149-9158
The synthesis and a comparative study of deglycobleomycin A2 analogues containing key modifications in the valerate subunit are described in efforts that define the role of the linker length and it...
Autor:
Timothy M. Ramsey, Ronald L. Halterman
Publikováno v:
Journal of Organometallic Chemistry. 547:41-48
The preparation of 7-anti-(3-methyl-3-butenyl)norbornene 11 is described. This meso-symmetrical diene underwent ring-opening/ring-closing olefin metathesis catalyzed by bis(cyclopentadienyl)titanacyclobutane 4 to give (1R ∗ , 6R ∗ , 7S ∗ ) -7-e
Autor:
Timothy M. Ramsey, Ronald L. Halterman
Publikováno v:
Journal of Organometallic Chemistry. 530:225-234
The coupling of enantiomerically enriched 2,2′-dilithio-1,1′-binaphthyl with various annulated cyclopentenones or 2-indanone proves to be a facile route for the preparation of a series of annulated bis(cyclopentadienes) or bis(indenes) bridged at
Publikováno v:
Journal of Organometallic Chemistry. 497:43-53
We have demonstrated a very efficient (5 steps, 28% yield from 1-octen-7-yne and 1,2-diiodobenzene) and novel synthesis of 1,2-bis(9-bicyclo[4.3.0]-non-1,6-dinyl)benzen. We utilized for the firstime in a bis(cyclopentadiene) synthesis the double Paus
Autor:
Timothy M. Ramsey, Ronald L. Halterman
Publikováno v:
Journal of Organometallic Chemistry. 465:175-179
The catalytic epoxidation of trans -3-hexene with electronically different bis(2-aryl-4,5,6,7-tetrahydroindenyl)titanium dichloride complexes in the presence of stoichiometric tert-butylhydroperoxide has been studied. The results show that both elect
Autor:
Timothy M. Ramsey, Ronald L. Halterman
Publikováno v:
ChemInform. 24
Publikováno v:
ChemInform. 25
Publikováno v:
ChemInform. 26
We have demonstrated a very efficient (5 steps, 28% yield from 1-octen-7-yne and 1,2-diiodobenzene) and novel synthesis of 1,2-bis(9-bicyclo[4.3.0]-non-1,6-dinyl)benzen. We utilized for the firstime in a bis(cyclopentadiene) synthesis the double Paus