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Volumn 50, Issue 27, 2011, Pages 6171-6174

Synthesis with perfect atom economy: Generation of diazo ketones by 1,3-dipolar cycloaddition of nitrous oxide at cyclic alkynes under mild conditions

Author keywords

cascade reactions; nitrogen heterocycles; reaction mechanisms; rearrangements; strained compounds

Indexed keywords

CASCADE REACTIONS; NITROGEN HETEROCYCLES; REACTION MECHANISM; REARRANGEMENTS; STRAINED COMPOUNDS;

EID: 79959527516     PISSN: 14337851     EISSN: 15213773     Source Type: Journal    
DOI: 10.1002/anie.201101326     Document Type: Article
Times cited : (38)

References (77)
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    • A bottle with nitrous oxide for medical use (50bar, ca. 0.21Euro per mole) was utilized. R. L. Danheiser, A. L. Helgason, J. Am. Chem. Soc. 1994, 116, 9471-9479
    • (1994) J. Am. Chem. Soc. , vol.116 , pp. 9471-9479
    • Danheiser, R.L.1    Helgason, A.L.2
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    • Dissertation, Universität Mainz
    • M. Schmitt, Dissertation, Universität Mainz, 1992.
    • (1992)
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    • For the thermal decomposition of 20 a, see.
    • For the thermal decomposition of 20 a, see:, P. W. Concannon, J. Ciabattoni, J. Am. Chem. Soc. 1973, 95, 3284-3289.
    • (1973) J. Am. Chem. Soc. , vol.95 , pp. 3284-3289
    • Concannon, P.W.1    Ciabattoni, J.2
  • 64
    • 79959517927 scopus 로고    scopus 로고
    • Clearly, diazo ketone 20, generated from 18 and nitrous oxide, added 18 very rapidly so that the Wolff rearrangement of 20 could not compete. On the other hand, attempts to trap the intermediate 20 by electron-deficient alkynes, such as dimethyl acetylenedicarboxylate (see Ref.[24]) or dicyanoacetylene (to avoid addition of 18) were unsuccessful
    • Clearly, diazo ketone 20, generated from 18 and nitrous oxide, added 18 very rapidly so that the Wolff rearrangement of 20 could not compete. On the other hand, attempts to trap the intermediate 20 by electron-deficient alkynes, such as dimethyl acetylenedicarboxylate (see Ref.[24]) or dicyanoacetylene (to avoid addition of 18) were unsuccessful.
  • 65
    • 84953864684 scopus 로고
    • For similar rearrangement reactions of 3-acyl-3H-pyrazoles to produce 1-acyl-1H-pyrazoles, see.
    • For similar rearrangement reactions of 3-acyl-3H-pyrazoles to produce 1-acyl-1H-pyrazoles, see:, M. Martin, M. Regitz, Justus Liebigs Ann. Chem. 1974, 1702-1708.
    • (1974) Justus Liebigs Ann. Chem. , pp. 1702-1708
    • Martin, M.1    Regitz, M.2
  • 76
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    • We prepared 23 a from 3-methoxycyclooctene by addition of bromine and subsequent treatment with potassium tert-butoxide and then treatment with lithium diisopropylamide, see the Supporting Information
    • We prepared 23 a from 3-methoxycyclooctene by addition of bromine and subsequent treatment with potassium tert-butoxide and then treatment with lithium diisopropylamide, see the Supporting Information.
  • 77
    • 79959491943 scopus 로고    scopus 로고
    • The unknown 23 b was synthesized from 3-bromocyclooctene by addition of bromine and subsequent treatment with potassium tert-butoxide. The resulting dibromides were treated with isopropylmagnesium bromide and then with lithium diisopropylamide, see the Supporting Information
    • The unknown 23 b was synthesized from 3-bromocyclooctene by addition of bromine and subsequent treatment with potassium tert-butoxide. The resulting dibromides were treated with isopropylmagnesium bromide and then with lithium diisopropylamide, see the Supporting Information.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.