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Organo Phosphorus-Selenium Heterocycles Derived from Haloalkanols and Alkenes

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Date
10/2012
Author
Hua, Guoxiong
Fuller, Amy L.
Slawin, Alexandra M. Z.
Woollins, J. Derek
Keywords
Woollin's reagent
Phosphorus-selenium heterocycle
Alkenes
Haloalkanonls
Selenoamide
QD Chemistry
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Abstract
Treating Woollins' reagent with an equimolar amount of sodium 2-bromoalkanolates (which were prepared in situ from the reaction of bromoalkanol and NaH) in THF gave five- or six-membered PSeOCn (n = 2 or 3) phosphorus-selenium heterocycles 3 and 4 in good yields. Woollins' reagent reacting with one equivalent of conjugated 1,3-dienes led to the formation of different end products: with 1,4-diphenylbuta-1,3-diene giving a five-membered 2,3,5-triphenyl-4-styryl-1,2,5-selenadiphospholane 2,5-diselenide; however, with 2,3-dibenzyl-1,3-butadiene affording 4,5-dibenzyl-2-phenyl-3,6-dihydro-2H-1,2-selenaphosphinine 2-selenide as a major isolable product. Refluxing Woollins' reagent with one equivalent of unconjugated 2,5-dimethyl-1,5-hexyldiene in toluene produced P-Se heterocyclic compound 3-methyl-3-(3-methylbut-3-en- 1-yl)-2,5-diphenyl-1,2,5-selenadiphospholane 2,5-diselenide with the same five-membered C2P(Se)SeP(Se) motif as 2,3,5-triphenyl- 4-styryl-1,2,5-selenadiphospholane 2,5-diselenide. Further-more, heating a toluene solution of Woollins' reagent with an equimolar amount of N-allylaniline gave rise of a five-membered C2NP(Se)Se heterocycle 5-methyl-2,3-diphenyl-1,3,2-selenaza-phospholidine 2-selenide; carrying out a reaction of cinnamonitrile with an equivalent of Woollins' reagent under identical conditions did not give any air-stable product, however, 3-phenylprop-2-eneselenoamide was isolated in 95% yield after treatment with water. Three demonstrative X-ray structures are reported.
Citation
Hua , G , Fuller , A L , Slawin , A M Z & Woollins , J D 2012 , ' Organo Phosphorus-Selenium Heterocycles Derived from Haloalkanols and Alkenes ' , Synlett , vol. 23 , no. 17 , pp. 2453-2458 . https://doi.org/10.1055/s-0032-1317310
Publication
Synlett
Status
Peer reviewed
DOI
https://doi.org/10.1055/s-0032-1317310
ISSN
0936-5214
Type
Journal item
Rights
© 2012 Thieme Publishing. This is an Accepted Manuscript of an article published in Synlett October 2012, available online: https://www.thieme-connect.de/DOI/DOI?10.1055/s-0032-1317310
Description
Funding: University of St Andrews
Collections
  • University of St Andrews Research
URI
http://hdl.handle.net/10023/5104

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