91935-10-3Relevant academic research and scientific papers
Synthesis of Halogenated Anilines by Treatment of N, N-Dialkylaniline N-Oxides with Thionyl Halides
Reed, Hayley,Paul, Tyler R.,Chain, William J.
, p. 11359 - 11368 (2018/08/06)
The special reactivity of N,N-dialkylaniline N-oxides allows practical and convenient access to electron-rich aryl halides. A complementary pair of reaction protocols allow for the selective para-bromination or ortho-chlorination of N,N-dialkylanilines in up to 69% isolated yield. The generation of a diverse array of halogenated anilines is made possible by a temporary oxidation level increase of N,N-dialkylanilines to the corresponding N,N-dialkylaniline N-oxides and the excision of the resultant weak N-O bond via treatment with thionyl bromide or thionyl chloride at low temperature.
Novel 11β-substituted-19-nor-steroids
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, (2008/06/13)
Novel 19-nor-steroids of the formula STR1 wherein R1 is an organic group of 1 to 18 carbon atoms optionally containing at leat one heteroatom with the atom immediately adjacent the 11-carbon atom being carbon, R2 is a hydrocarbon of 1 to 8 carbon atoms, X is the remainder of a pentagonal or hexagonal ring optionally substituted and optionally containing one unsaturated bond, the A and B rings are selected from the group consisting of STR2 R' and R" are individually selected from the group consisting of hydrogen, --CN and alkyl of 1 to 4 carbon atoms, Rx is selected from the group consisting of hydrogen and ORe, Re is selected from the group consisting of hydrogen, optionally substituted alkyl of 1 to 6 carbon atoms and acyl, Ra may be in the E or Z positions as indicated by the wavy line and is selected from the group consisting of STR3 and acyloxy, Ra ' and Ra " are alkyl of 1 to 4 carbon atoms or taken together with the nitrogen atom form a heterocycle of 5 to 6 chain members optionally containing another heteroatom with the proviso that when A and B are STR4 wherein R' and R" are both hydrogen, R1 contain at least one nitrogen, phosphorus or silicium atom and when A and B are STR5 R1 is not a linear alkyl and their non-toxic, pharmaceutically acceptable acid addition salts having a remarkable antiglucocorticoid activity, their preparation and novel intermediates.
Steroid derivatives
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, (2008/06/13)
Novel 19-nor steroids and 19-nor-D-homo-steroids of the formula STR1 wherein R 1 is an organic radical of 1 to 18 carbon atoms containing at least one atom selected from the group consisting of nitrogen, phosphorous and silicon with the atom immediately adjacent to the 11-carbon atom being carbon, R 2 is a hydrocarbon of 1 to 8 carbon atoms, X is selected from the group consisting of a pentagonal ring and a hexagonal ring optionally substituted and optionally containing a double bond, B and C together form a double bond or an epoxy group, the C A group at position 3 is selected from the group consisting of C O, ketal, which may be open or closed STR2 are selected from the group consisting of alkyl of 1 to 8 carbon atoms and aralkyl of 7 to 15 carbon atoms and their non-toxic, pharmaceutically acceptable acid addition salts having anti-glucocorticoid activity and a process for their preparation.
Steroid derivatives
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, (2008/06/13)
Novel 19-nor steroids and 19-nor-D-homo-steroids of the formula STR1 wherein R1 is an organic radical of 1 to 18 carbon atoms containing at least one atom selected from the group consisting of nitrogen, phosphorous and silicon with the atom immediately adjacent to the 11-carbon atom being carbon, R2 is a hydrocarbon of 1 to 8 carbon atoms, X is selected from the group consisting of a pentagonal ring and a hexagonal ring optionally substituted and optionally containing a double bond, B and C together form a double bond or an epoxy group, the C=A group at position 3 is selected from the group consisting of C--O, ketal, which may be open or closed STR2 --C=NOH, --C--NOAlK3 and C--CH2, AlK1, AlK2 and AlK3 are selected from the group consisting of alkyl of 1 to 8 carbon atoms and aralkyl of 7 to 15 carbon atoms and their non-toxic, pharmaceutically acceptable acid addition salts having anti-glucocorticoid activity and a process for their preparation.
Novel steroids
-
, (2008/06/13)
Novel 19-nor steroids and 19-nor-D-homo-steroids of the formula STR1 wherein R1 is an organic radical of 1 to 18 carbon atoms containing at least one atom selected from the group consisting of nitrogen, phosphorous and silicon with the atom immediately adjacent to the 11-carbon atom being carbon, R2 is a hydrocarbon of 1 to 8 carbon atoms, X is selected from the group consisting of a pentagonal ring and a hexagonal ring optionally substituted and optionally containing a double bond, B and C together form a double bond or an epoxy group, the C=A group at position 3 is selected from the group consisting of C=O, ketal, STR2 --C=NOH, --C=NOAlK3 and =CH2, AlK1, AlK2 and AlK3 are selected from the group consisting of alkyl of 1 to 8 carbon atoms and aralkyl of 7 to 15 carbon atoms and their non-toxic, pharmaceutically acceptable acid addition salts having anti-glucocorticoid activity and a process for their preparation.
