Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Antonio L. Coelho"'
Publikováno v:
The Journal of Organic Chemistry. 74:4094-4103
A concise synthesis of heteroaryl dibenzopyranones 9a,b, 10a,b, 11a-c, and 12a-c has been achieved by the LDA-induced migration of heterobiaryl O-carbamates 18, 21, 25, and 30 which, in turn, were prepared in good yield using a combined directed orth
Publikováno v:
Synthesis. 1999:1017-1021
Publikováno v:
Tetrahedron Letters. 42:4111-4113
Maackiain O-MOM derivative 3b was regioselectively lithiated at the C-10 position of D-ring and reacted with electrophiles. Regioselective lithiation of the C-10 TMS-substituted derivative 5d, followed by organocopper formation and treatment with pre
Autor:
M. L. A. A. Vasconcellos, Jaime A. Rabi, Paulo R. R. Costa, Antonio L. Coelho, Alessandro B. C. Simas
Publikováno v:
ChemInform. 24
Coupling of 7-methoxy-8-(3-methyl-2-butenyl)-2H-1-benzopyran (4 a) with 2-chloromercurio-4,5-methylenedioxyphenol (5) yields (±)-6 a,12 a-cis-dihydro-3-methoxy-4-(3-methyl-2-butenyl)-6H-[1,3] dioxolo[5,6]benzofuro[3,2-c][1]benzopyran (6; ±-4-prenyl
Publikováno v:
ChemInform. 26
A new approach to the total synthesis of (±)-neorautenane 14 is described, using the chemo-selective coupling of benzodipyran 12 and o-chloromercuriophenol 13 as the key step. Compound 12 is synthesized in four steps from chromanone 7.
Publikováno v:
ChemInform. 30
Publikováno v:
ChemInform. 33
Maackiain O-MOM derivative 3b was regioselectively lithiated at the C-10 position of D-ring and reacted with electrophiles. Regioselective lithiation of the C-10 TMS-substituted derivative 5d, followed by organocopper formation and treatment with pre
Publikováno v:
ChemInform. 40
A concise synthesis of heteroaryl dibenzopyranones 9a,b, 10a,b, 11a−c, and 12a−c has been achieved by the LDA-induced migration of heterobiaryl O-carbamates 18, 21, 25, and 30 which, in turn, were prepared in good yield using a combined directed
Publikováno v:
J. Chem. Soc., Perkin Trans. 1. :949-951
A new approach to the total synthesis of (±)-neorautenane 14 is described, using the chemo-selective coupling of benzodipyran 12 and o-chloromercuriophenol 13 as the key step. Compound 12 is synthesized in four steps from chromanone 7.
Autor:
Paulo R. R. Costa, Alessandro B. C. Simas, Jaime A. Rabi, M. L. A. A. Vasconcellos, Antonio L. Coelho
Publikováno v:
Synthesis. 1992:914-916
Coupling of 7-methoxy-8-(3-methyl-2-butenyl)-2H-1-benzopyran (4 a) with 2-chloromercurio-4,5-methylenedioxyphenol (5) yields (±)-6 a,12 a-cis-dihydro-3-methoxy-4-(3-methyl-2-butenyl)-6H-[1,3] dioxolo[5,6]benzofuro[3,2-c][1]benzopyran (6; ±-4-prenyl