Research output: Contribution to journal › Article › peer-review
Spirocyclizations Involving Oxonium Ylides Derived from Cyclic α-Diazocarbonyl Compounds : An Entry into 6-Oxa-2-azaspiro[4.5]decane Scaffold. / Dar'in, Dmitry; Kantin, Grigory; Bakulina, Olga; Inyutina, Anna; Chupakhin, Evgeny; Krasavin, Mikhail.
In: Journal of Organic Chemistry, Vol. 85, No. 23, 23.11.2020, p. 15586–15599.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Spirocyclizations Involving Oxonium Ylides Derived from Cyclic α-Diazocarbonyl Compounds
T2 - An Entry into 6-Oxa-2-azaspiro[4.5]decane Scaffold
AU - Dar'in, Dmitry
AU - Kantin, Grigory
AU - Bakulina, Olga
AU - Inyutina, Anna
AU - Chupakhin, Evgeny
AU - Krasavin, Mikhail
N1 - Funding Information: This research was supported by the Russian Science Foundation (project grant 20-13-00024). We thank the Research Center for Magnetic Resonance, the Center for Chemical Analysis and Materials Research and the Center for X-ray Diffraction Methods of Saint Petersburg State University Research Park for obtaining the analytical data. Publisher Copyright: © 2020 American Chemical Society. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/11/23
Y1 - 2020/11/23
N2 - New types of cyclic diazo compounds capable of Rh(II)-catalyzed spirocyclizations with tetrahydrofuran have been discovered. The formation of the spirocyclic framework is thought to proceed via the formation of Rh(II) carbene species followed by interaction with the Lewis basic oxygen atom of tetrahydrofuran to give oxonium ylide species. The latter evolves predominantly via the Stevens type rearrangement leading to an [n + 1] ring expansion of the tetrahydrofuran moiety, which results in the formation of a medicinally relevant 6-oxa-2-azaspiro[4.5]decane scaffold. The spirocyclization process was often observed in competition with mechanistically distinct C-H insertion into a tetrahydrofuran molecule. This competing process gave compounds based on the 3-(tetrahydrofur-2-yl)pyrrolidine scaffold, which are also relevant from the medicinal chemistry standpoint. These findings enrich the available arsenal of metal-catalyzed spirocyclization methods based on the use of cyclic diazo compounds.
AB - New types of cyclic diazo compounds capable of Rh(II)-catalyzed spirocyclizations with tetrahydrofuran have been discovered. The formation of the spirocyclic framework is thought to proceed via the formation of Rh(II) carbene species followed by interaction with the Lewis basic oxygen atom of tetrahydrofuran to give oxonium ylide species. The latter evolves predominantly via the Stevens type rearrangement leading to an [n + 1] ring expansion of the tetrahydrofuran moiety, which results in the formation of a medicinally relevant 6-oxa-2-azaspiro[4.5]decane scaffold. The spirocyclization process was often observed in competition with mechanistically distinct C-H insertion into a tetrahydrofuran molecule. This competing process gave compounds based on the 3-(tetrahydrofur-2-yl)pyrrolidine scaffold, which are also relevant from the medicinal chemistry standpoint. These findings enrich the available arsenal of metal-catalyzed spirocyclization methods based on the use of cyclic diazo compounds.
UR - http://www.scopus.com/inward/record.url?scp=85097890667&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/9b3b47db-b860-364e-bb98-85ebef284aae/
U2 - 10.1021/acs.joc.0c02356
DO - 10.1021/acs.joc.0c02356
M3 - Article
AN - SCOPUS:85097890667
VL - 85
SP - 15586
EP - 15599
JO - Journal of Organic Chemistry
JF - Journal of Organic Chemistry
SN - 0022-3263
IS - 23
ER -
ID: 72053104