Zobrazeno 1 - 10 of 27 pro vyhledávání: '"Ian C. Richards"'
2
Ligand effects in the metal catalysed reactions of N-aryldiazoamides: Ylide formation vs. insertion reactions
Autor: Darren J. Mansfield, Christopher J. Moody, Soyfur Miah, Alexandra M. Z. Slawin, Ian C. Richards
Publikováno v: Tetrahedron. 54:9689-9700
Diazoamides 1a and 1b were prepared from 2-(O-allyl)- and 2-(S-allyl) anilines 2 respectively. Copper(II) catalysed decomposition of 1 resulted in formation of benzofused heterocycles 7 by [2,3]-rearrangement of the intermediate ylide. Rhodium(II) pe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::717909dbbc25e36d44cff4da8fa25eee
https://doi.org/10.1016/s0040-4020(98)00525-0
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3
Stereocontrol in the intramolecular Buchner reaction of diazoamides and diazoesters
Autor: Christopher J. Moody, Alexandra M. Z. Slawin, Soyfur Miah, Ian C. Richards, Darren J. Mansfield
Publikováno v: Journal of the Chemical Society, Perkin Transactions 1. :4067-4076
Dirhodium(II) catalysed decomposition of diazoamide 5 resulted in formation of β-lactams 6/7 by intramolecular C–H insertion, the intramolecular Buchner reaction being disfavoured for conformational reasons. The diazoamide 8, however, gave product
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::edabdb84abf8517f27b32d888f0b88cb
https://doi.org/10.1039/a807622g
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4
Synthesis of the marine dibromooxoindoline convolutamydine C
Autor: Christopher J. Moody, Alexandra M. Z. Slawin, Ian C. Richards, Soyfur Miah
Publikováno v: Journal of the Chemical Society, Perkin Transactions 1. :2405-2412
A synthesis of the marine 4,6-dibromo-3-hydroxyoxoindoline convolutamydine C 3 is described. The key steps are the rhodium(II) perfluorobutyramide catalysed cyclisation of diazoamide 17 to give the oxoindoline 18, and the subsequent high yielding one
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::26feb72b9d4862e64638203b6ca4c0ee
https://doi.org/10.1039/a700683g
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5
Ligand effects in the rhodium(II) catalysed reactions of diazoamides and diazoimides
Autor: Joseph P. Marino, Soyfur Miah, Scott M. Sheehan, Ian C. Richards, Albert Padwa, Alexandra M. Z. Slawin, Christopher J. Moody, Mark A. Semones
Publikováno v: Tetrahedron. 52:2489-2514
A range of substituted α-diazoamides 1–8 and diazoimides 9–12 was prepared from the corresponding amines or amides. Rhodium(II) catalysed decomposition of the diazoamides resulted in attack on the aromatic ring to give oxindoles or attack on the
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bfc37f0324f3ddaadbbcf12a72bc8e55
https://doi.org/10.1016/0040-4020(95)01070-x
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6
The stereochemically controlled synthesis of spirocyclic ethers and lactones with medium-sized (7-, 8-, and 12-membered) carbocyclic rings by phenylthio migration: 1-oxaspiro[4.n]alkanes and alkan-2-ones with n = 6, 7, and 11
Autor: Kevin P. Jenkins, Ian C. Richards, Kelly Chibale, Richard C. Hartley, Matthew Simons, Stuart Warren
Publikováno v: Tetrahedron Letters. 34:6783-6786
3-Methyl-4-phenylthio-1-oxaspiro[4.6]undecanes, [4.7]dodecanes, [4.11]hexadecanes and the corresponding 2-ones (lactones) can be made from cyclohepta-, octa-, and dodecanone by chain extension to the 2-phenylthio-carbaldehyde, stereoselective aldol r
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b8f873631a89d02afcce1deee450aa98
https://doi.org/10.1016/s0040-4039(00)61701-x
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8
ChemInform Abstract: The Stereochemically Controlled Synthesis of Spirocyclic Ethers and Lactones with Medium-Sized (7-, 8-, and 12-Membered) Carbocyclic Rings by Phenylthio Migration: 1-Oxaspiro(4.n)alkanes and Alkan-2-ones with n = 6, 7, and 11
Autor: Matthew Simons, Ian C. Richards, Richard C. Hartley, Kevin P. Jenkins, Kelly Chibale, Stuart Warren
Publikováno v: ChemInform. 25
3-Methyl-4-phenylthio-1-oxaspiro[4.6]undecanes, [4.7]dodecanes, [4.11]hexadecanes and the corresponding 2-ones (lactones) can be made from cyclohepta-, octa-, and dodecanone by chain extension to the 2-phenylthio-carbaldehyde, stereoselective aldol r
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::49092e0326b84aff741f4bc57f78a52b
https://doi.org/10.1002/chin.199402055
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9
ChemInform Abstract: A New and Effective Method for the Low Temperature Generation of Sulfonium Ylides from Allyl Sulfides
Autor: Richard C. Hartley, Stuart Warren, Ian C. Richards
Publikováno v: ChemInform. 25
Allyl 4-methoxyphenyl sulfides can be converted into sulphonium ylides which undergo [2,3] sigmatropic rearrangement in high yield and with excellent stereoselectivity by repeated alternate additions of a diazonium salt and tetrafluoroboric acid at l
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::67a04b2d1e08fee523e31058be8f7c48
https://doi.org/10.1002/chin.199427047
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10
ChemInform Abstract: Stereocontrolled Synthesis of E-Homoallylic Sulfides with 1,4,5 Related Chiral Centres Using the (2,3) Sigmatropic Rearrangement of Sulfonium Ylides
Autor: Ian C. Richards, Stuart Warren, Richard C. Hartley
Publikováno v: ChemInform. 27
E-Homoallylic sulfides with 1,4,5 related chiral centres have been synthesised in a stereocontrolled way. An aldol condensation sets up the stereochemistry. Lactonisation with 1,2 arylsulfanyl migration followed by reduction and sulfur-assisted dehyd
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c2c3cc4f00b24f895b14e27cfc666554
https://doi.org/10.1002/chin.199623070
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