Zobrazeno 1 - 10
of 58
pro vyhledávání: '"Steven W. Baldwin"'
Autor:
Steven W. Baldwin, Marc J. Adler
Publikováno v:
Tetrahedron Letters. 50:5075-5079
Herein is reported an efficient method for the synthesis of 2,2-dimethyl-2H-chromenes in a single step from the corresponding phenol and 3-methyl-2-butenal via microwave irradiation in CDCl3. This protocol features a mild reaction environment (neutra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3b265a3c59da33fab8d2d6d246ebe378
https://doi.org/10.1016/j.tetlet.2009.06.090
https://doi.org/10.1016/j.tetlet.2009.06.090
Autor:
Stuart H. Pullen, Shannon L. Studer-Martinez, Amanda L. Harris, Heinz A. Staab, John D. Simon, Alan Long, Maurice D. Edington, Steven W. Baldwin
Publikováno v:
The Journal of Physical Chemistry A. 103:10220-10225
The back electron transfer following photoexcitation of the bimolecular charge-transfer complex between 1,4-dimethoxybenzene (DMB) and 7,7-dicyanobenzoquinone methide (DCBM) is compared to the dynamics observed for the corresponding spatially constra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b58d7a38e716e7a6d1b4336bea6e12e
https://doi.org/10.1021/jp991973s
https://doi.org/10.1021/jp991973s
Publikováno v:
Tetrahedron Letters. 39:6819-6822
The preparation and characterization of cyclic optically active (5R)-3,4,5,6-tetrahydro-5-phenyl-2H-1,4-oxazin-2-one-N-oxide (2) is described. This nitrone, which is viewed as a template for the synthesis of γ-oxygenated α-amino acids, reacts with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2de057662e05166c571d58be73f0ddb8
https://doi.org/10.1016/s0040-4039(98)01474-9
https://doi.org/10.1016/s0040-4039(98)01474-9
Autor:
Alan Long, Steven W. Baldwin
Publikováno v:
Tetrahedron Letters. 42:5343-5345
A new two-step route to derivatives of homophenylalanine is presented. Cycloaddition of a cyclic nitrone glycine template with various styrene derivatives affords good yields of 5-substituted cycloadducts. One-step hydrogenolysis (three bonds) then a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6334a680f9c830f8734afea97f4e34b9
https://doi.org/10.1016/s0040-4039(01)00821-8
https://doi.org/10.1016/s0040-4039(01)00821-8
Autor:
S. C. Gedon, Steven W. Baldwin
Publikováno v:
ChemInform. 22
The diastereomeric ratios of several intramolecular nitrone/alkene cycloaddition reactions have been shown to be sensitive to the substituent on the nitrone nitrogen in a double diastereodifferentiation process.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d7307d07a4005f758bcb5be7d257baa
https://doi.org/10.1002/chin.199148053
https://doi.org/10.1002/chin.199148053
Autor:
Steven W. Baldwin, J. M. Mciver
Publikováno v:
ChemInform. 23
The addition of a series of “CH 3 -” nucleophiles to aldehyde 4 provides selectivities which range from 1/3.5 to 140/1.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d51ad627284a48dafedd71c8b53ba4a
https://doi.org/10.1002/chin.199205167
https://doi.org/10.1002/chin.199205167
Publikováno v:
ChemInform. 29
The preparation and characterization of cyclic optically active (5R)-3,4,5,6-tetrahydro-5-phenyl-2H-1,4-oxazin-2-one-N-oxide (2) is described. This nitrone, which is viewed as a template for the synthesis of γ-oxygenated α-amino acids, reacts with
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85a34df1c7e3043d6cea3cf55ef661d4
https://doi.org/10.1002/chin.199849204
https://doi.org/10.1002/chin.199849204
Autor:
John S. Debenham, Steven W. Baldwin
Publikováno v:
ChemInform. 31
The total syntheses of the amaryllidaceae alkaloids haemanthidine, pretazettine, and tazettine as optically pure enantiomers are reported. Using d-mannose as the starting material, the critical rel...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a86de0eac520950263a51f2e84b72d0b
https://doi.org/10.1002/chin.200015189
https://doi.org/10.1002/chin.200015189
Publikováno v:
ChemInform. 31
A protocol for achieving stereoselective aldol reactions with cyclic ketones is presented. In terms of yield, the process is particularly effective when a quaternary center at the α-carbon of the β-hydroxy ketone product is created. The stereochemi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1dcaedef3a6ee43496824a2e3ef9fa22
https://doi.org/10.1002/chin.200032067
https://doi.org/10.1002/chin.200032067
Autor:
Steven W. Baldwin, Alan Long
Publikováno v:
ChemInform. 32
A new two-step route to derivatives of homophenylalanine is presented. Cycloaddition of a cyclic nitrone glycine template with various styrene derivatives affords good yields of 5-substituted cycloadducts. One-step hydrogenolysis (three bonds) then a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2173e6a08ffb4a14ef0e72be685a23ff
https://doi.org/10.1002/chin.200144204
https://doi.org/10.1002/chin.200144204