Research output: Contribution to journal › Article › peer-review
2-Diazoacetyl-2 H-azirines: Source of a Variety of 2 H-Azirine Building Blocks with Orthogonal and Domino Reactivity. / Sakharov, Pavel A.; Novikov, Mikhail S.; Khlebnikov, Alexander F.
In: Journal of Organic Chemistry, Vol. 83, No. 15, 03.08.2018, p. 8304-8314.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - 2-Diazoacetyl-2 H-azirines: Source of a Variety of 2 H-Azirine Building Blocks with Orthogonal and Domino Reactivity
AU - Sakharov, Pavel A.
AU - Novikov, Mikhail S.
AU - Khlebnikov, Alexander F.
PY - 2018/8/3
Y1 - 2018/8/3
N2 - A synthesis of 2-diazoacetyl-2H-azirines was developed starting from 2H-azirine-2-carbonyl chlorides, generated by Fe(II)-catalyzed isomerization of 5-chloroisoxazoles. 2-Diazoacetyl-2H-azirines easily undergo reactions characteristic of α-diazo ketones with preservation of the azirine ring. Reactions with hydrohalogenic, carboxylic, and p-toluenesulfonic acids provide novel 1-(3-aryl-2H-azirin-2-yl)-2-halo- and 2-(R-oxy)ethan-1-ones in good yields. The synthesized 2H-azirines can offer many possibilities for chemical manipulation in heterocyclic synthesis, due to the presence of highly reactive azirine and the exocyclic C(O)-CHN2 or C(O)-CH2X functionalities, which can show orthogonal or domino reactivity. The synthetic usefulness of the developed building blocks was demonstrated by the preparation of new types of heterocyclic dyads (azirine-oxazole, azirine-pyrazoline, azirine-thiazole, azirine-oxirane, pyrrole-oxazole) as well as an azirine chalcone analogue, 2-azidoacetyl-2H-azirine, and 2-diazoacetylaziridine derivatives.
AB - A synthesis of 2-diazoacetyl-2H-azirines was developed starting from 2H-azirine-2-carbonyl chlorides, generated by Fe(II)-catalyzed isomerization of 5-chloroisoxazoles. 2-Diazoacetyl-2H-azirines easily undergo reactions characteristic of α-diazo ketones with preservation of the azirine ring. Reactions with hydrohalogenic, carboxylic, and p-toluenesulfonic acids provide novel 1-(3-aryl-2H-azirin-2-yl)-2-halo- and 2-(R-oxy)ethan-1-ones in good yields. The synthesized 2H-azirines can offer many possibilities for chemical manipulation in heterocyclic synthesis, due to the presence of highly reactive azirine and the exocyclic C(O)-CHN2 or C(O)-CH2X functionalities, which can show orthogonal or domino reactivity. The synthetic usefulness of the developed building blocks was demonstrated by the preparation of new types of heterocyclic dyads (azirine-oxazole, azirine-pyrazoline, azirine-thiazole, azirine-oxirane, pyrrole-oxazole) as well as an azirine chalcone analogue, 2-azidoacetyl-2H-azirine, and 2-diazoacetylaziridine derivatives.
KW - ALPHA,BETA-EPOXY DIAZOMETHYL KETONES
KW - ALPHA-DIAZOCARBONYL COMPOUNDS
KW - IRON-CATALYZED CYCLOPROPANATION
KW - ORGANIC-SYNTHESIS
KW - REARRANGEMENT
KW - CHEMISTRY
KW - HETEROCYCLES
KW - GENERATION
KW - DIAZO
UR - http://www.scopus.com/inward/record.url?scp=85049606930&partnerID=8YFLogxK
U2 - 10.1021/acs.joc.8b01004
DO - 10.1021/acs.joc.8b01004
M3 - Article
AN - SCOPUS:85049606930
VL - 83
SP - 8304
EP - 8314
JO - Journal of Organic Chemistry
JF - Journal of Organic Chemistry
SN - 0022-3263
IS - 15
ER -
ID: 34512341