1702
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1703
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Ahmed S, Patel RG. Intramural jejunal haematoma after peroral mucosal biopsy in a child with intestinal malrotation. Arch Dis Child 1971; 46:723-4. [PMID: 5118066 PMCID: PMC1647863 DOI: 10.1136/adc.46.249.723] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
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1704
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Ahmed S. Abdominoscrotal hydrocele in an infant. Surgery 1971; 70:316-7. [PMID: 4254358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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1705
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1707
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Ahmed S, Alauddin M, Caddy B, Martin-Smith M, Sidwell WTL, Watson TR. Bisquaternary ammonium salts derived from 3α,12α-Diamino-5β-cholane and 3α,12α-Diamino-24-nor-5β-cholane. Aust J Chem 1971. [DOI: 10.1071/ch9710521] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The preparation of 3α,12α-bisdimethylamino-5β-cholane
dimethiodide, 3α,12α-bisdimethylamino-5β-cholane
dimethiodide, 3α,12α- bisdimethylamino-24-nor-5β-cholanedimethiodide,
and 3α,12α- bisdimethylamino-24-nor-5β-cholanediethiodide,
from deoxycholic acid are described. During this work it was found that
attempted copper- quinoline decarboxylation of dehydrocholic acid gives rise to
lactol formation, and that what had previously been considered to be 3α,12α- dihydroxy-5β-cholane is a mixture of
this compound and 12α,24- dihydroxy-5β-cholane. Comparable
selectivity of attack by methanesulphonyl chloride and toluene-p-sulphonyl
chloride occurs with various polyhydric alcohols derived from bile acids, as
evidenced from the products of reduction of the sulphonates with lithium
aluminium hydride. With both 5α- and 5β-cholane derivatives, a C 3
equatorial hydroxyl group exhibits comparable reactivity to the terminal
primary hydroxyl group, generated from the bile acid carboxylic group, towards
both sulphonyl chlorides. With axial hydroxyl groups at C 7 and C 12,
toluene-p-sulphonate formation is much more difficult than methane- sulphonate
formation. Reduction by means of lithium aluminium hydride of equatorial
sulphonate esters at C 7 and C 12 gives rise to a methylene group, but the axial
sulphonates under the same conditions give the axial alcohol. The same clear
distinction between equatorial and axial sulphonate esters is not observed at C
3 and C 6, but 17α- methanesulphonyloxy-5α-androstane
gives 5α-androstane and the 17β- ester gives 17β-hydroxy-5α-androstane.
Reduction of 12-oximino groups in both 5α- and
5β-cholanes with sodium and ethanol, hydrogen in
the presence of a catalyst, or lithium aluminium hydride gives solely the
12α-amino compound.
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1708
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Parkash S, Kumar K, Ahmed S. Meconium plug syndrome. Indian J Pediatr 1970; 37:625-6. [PMID: 5515252 DOI: 10.1007/bf02811185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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1710
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1711
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Ahmed S, Khan AK, Hasan M, Jamal ABM. A huge acrochordon in labia majora - An unusual presentation. ACTA ACUST UNITED AC 1970; 37:110-1. [DOI: 10.3329/bmrcb.v37i3.9123] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
DOI: http://dx.doi.org/10.3329/bmrcb.v37i3.9123 BMRCB 2011; 37(3): 110-111
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1712
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1713
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Martin AR, Mosley WH, Sau BB, Ahmed S, Huq I. Epidemiologic analysis of endemic cholera in urban East Pakistan, 1964-1966. Am J Epidemiol 1969; 89:572-82. [PMID: 5770168 DOI: 10.1093/oxfordjournals.aje.a120970] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
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1714
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1715
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1716
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Ahmed S. Antibacterial Activity of the Penicillins. West J Med 1962. [DOI: 10.1136/bmj.1.5291.1557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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1717
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Ahmed S. "A Case of Renal Failure". West J Med 1961. [DOI: 10.1136/bmj.2.5265.1501-d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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1718
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Ahmed S. Lung Massage. West J Med 1961. [DOI: 10.1136/bmj.2.5261.1224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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