Bicyclic Sultams with a Nitrogen at the Bridgehead and a Sulfur Atom in the Apex Position: Facile Preparation and Conformational Properties
A practical synthesis of bicyclic sultams with a pyramidal bridgehead nitrogen atom and a sulfur atom in the apex position has been elaborated. Compounds with 1‐azathiabicyclo[2.2.1]heptane (12a), ‐bicyclo[3.2.1]octane (12b, 12d), and ‐bicyclo[3.3.1]nonane (13b) skeletons were obtained by direct two...
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Published in: | European Journal of Organic Chemistry Vol. 2010; no. 18; pp. 3481 - 3486 |
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Abstract | A practical synthesis of bicyclic sultams with a pyramidal bridgehead nitrogen atom and a sulfur atom in the apex position has been elaborated. Compounds with 1‐azathiabicyclo[2.2.1]heptane (12a), ‐bicyclo[3.2.1]octane (12b, 12d), and ‐bicyclo[3.3.1]nonane (13b) skeletons were obtained by direct twofold inter/intramolecular alkylation of corresponding monocyclic sultams 9 and 10 with α,ω‐dihalides 11 in K2CO3/DMF in 56, 68, 52 and 52 % yield, respectively. On the other hand, a 1‐aza‐9‐thiabicyclo[4.2.1]nonane derivative (12c) could be prepared only by stepwise dialkylation in 24 % overall yield. Structural and conformational properties of four of the newly prepared bicyclic sultams in solution as well as in the solid state are discussed.
Bicyclic sultams with 1‐azathiabicyclo[2.2.1]heptane, ‐bicyclo[3.2.1]octane, and‐bicyclo[3.3.1]nonane skeletons have been prepared by direct twofold inter/intramolecular alkylation of corresponding monocyclic sultams with α,ω‐dihalides in 56, 68, 52 and 52 % yield. |
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AbstractList | A practical synthesis of bicyclic sultams with a pyramidal bridgehead nitrogen atom and a sulfur atom in the apex position has been elaborated. Compounds with 1‐azathiabicyclo[2.2.1]heptane (
12a
), ‐bicyclo[3.2.1]octane (
12b
,
12d
), and ‐bicyclo[3.3.1]nonane (
13b
) skeletons were obtained by direct twofold inter/intramolecular alkylation of corresponding monocyclic sultams
9
and
10
with α,ω‐dihalides
11
in K
2
CO
3
/DMF in 56, 68, 52 and 52 % yield, respectively. On the other hand, a 1‐aza‐9‐thiabicyclo[4.2.1]nonane derivative (
12c
) could be prepared only by stepwise dialkylation in 24 % overall yield. Structural and conformational properties of four of the newly prepared bicyclic sultams in solution as well as in the solid state are discussed. A practical synthesis of bicyclic sultams with a pyramidal bridgehead nitrogen atom and a sulfur atom in the apex position has been elaborated. Compounds with 1‐azathiabicyclo[2.2.1]heptane (12a), ‐bicyclo[3.2.1]octane (12b, 12d), and ‐bicyclo[3.3.1]nonane (13b) skeletons were obtained by direct twofold inter/intramolecular alkylation of corresponding monocyclic sultams 9 and 10 with α,ω‐dihalides 11 in K2CO3/DMF in 56, 68, 52 and 52 % yield, respectively. On the other hand, a 1‐aza‐9‐thiabicyclo[4.2.1]nonane derivative (12c) could be prepared only by stepwise dialkylation in 24 % overall yield. Structural and conformational properties of four of the newly prepared bicyclic sultams in solution as well as in the solid state are discussed. Bicyclic sultams with 1‐azathiabicyclo[2.2.1]heptane, ‐bicyclo[3.2.1]octane, and‐bicyclo[3.3.1]nonane skeletons have been prepared by direct twofold inter/intramolecular alkylation of corresponding monocyclic sultams with α,ω‐dihalides in 56, 68, 52 and 52 % yield. |
Author | Rassadin, Valentin A. Sokolov, Viktor V. Yufit, Dmitry S. de Meijere, Armin Tomashevskiy, Aleksandr A. Kozhushkov, Sergei I. Grosheva, Daria S. |
Author_xml | – sequence: 1 givenname: Valentin A. surname: Rassadin fullname: Rassadin, Valentin A. organization: Department of Chemistry, Saint Petersburg State University, Universitetskii pr. 26, 198504 Saint Petersburg, Russia – sequence: 2 givenname: Daria S. surname: Grosheva fullname: Grosheva, Daria S. organization: Department of Chemistry, Saint Petersburg State University, Universitetskii pr. 26, 198504 Saint Petersburg, Russia – sequence: 3 givenname: Aleksandr A. surname: Tomashevskiy fullname: Tomashevskiy, Aleksandr A. organization: Department of Chemistry, Saint Petersburg State University, Universitetskii pr. 26, 198504 Saint Petersburg, Russia – sequence: 4 givenname: Viktor V. surname: Sokolov fullname: Sokolov, Viktor V. email: vsokolo@mail.ru organization: Department of Chemistry, Saint Petersburg State University, Universitetskii pr. 26, 198504 Saint Petersburg, Russia – sequence: 5 givenname: Dmitry S. surname: Yufit fullname: Yufit, Dmitry S. organization: Department of Chemistry, University of Durham, South Rd., Durham DH1 3LE, UK – sequence: 6 givenname: Sergei I. surname: Kozhushkov fullname: Kozhushkov, Sergei I. organization: Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany – sequence: 7 givenname: Armin surname: de Meijere fullname: de Meijere, Armin email: ameijer1@gwdg.de organization: Institut für Organische und Biomolekulare Chemie der Georg-August-Universität Göttingen, Tammannstrasse 2, 37077 Göttingen, Germany |
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Snippet | A practical synthesis of bicyclic sultams with a pyramidal bridgehead nitrogen atom and a sulfur atom in the apex position has been elaborated. Compounds with... |
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SubjectTerms | Bridged sultams Conformational analysis Cyclization Oxidative deprotection Solid-state structures |
Title | Bicyclic Sultams with a Nitrogen at the Bridgehead and a Sulfur Atom in the Apex Position: Facile Preparation and Conformational Properties |
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