The Use of Switchable Polarity Solvents for the Synthesis of 16‐Arylidene Steroids via Claisen–Schmidt Condensation

Dávid Ispán; Eszter Szánti-Pintér; Maté Papp; Johan Wouters; Nikolay Tumanov; Balázs Balázs Zsirka; Ágnes Gömöry; László Kollár; Rita Skoda-Földes

doi:10.1002/ejoc.201800356

The Use of Switchable Polarity Solvents for the Synthesis of 16‐Arylidene Steroids via Claisen–Schmidt Condensation

Dávid Ispán, Eszter Szánti-Pintér, Maté Papp, Johan Wouters, Nikolay Tumanov, Balázs Balázs Zsirka, Ágnes Gömöry, László Kollár, Rita Skoda-Földes

Résultats de recherche: Contribution à un journal/une revue › Article › Revue par des pairs

Résumé

Switchable polarity recyclable solvent mixtures were applied as reaction medium and catalyst to replace the conventional base catalysts in the Claisen–Schmidt condensation of 17‐oxo steroids with aromatic aldehydes. Reversibility between ionic and nonionic forms of the new 2‐n‐butyl‐1,1,3,3‐tetramethylguanidine (nBu‐TMG)/ethylene glycol/CO2 and 2‐tert‐butyl‐1,1,3,3‐tetramethylguanidine (tBu‐TMG)/ethylene glycol/CO2 systems were proved by conductivity measurements. The structure of the ionic form was established by 1H NMR and IR measurements and by quantum chemical calculations. The steroidal products with androstane and estrane skeleton were characterised with spectroscopic methods (NMR, IR, MS).

langue originale	Anglais
Pages (de - à)	3236-3244
Nombre de pages	9
journal	European Journal of Organic Chemistry
Volume	2018
Numéro de publication	24
Les DOIs	https://doi.org/10.1002/ejoc.201800356
Etat de la publication	Publié - 29 juin 2018

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CCDC 1815277: Experimental Crystal Structure Determination
Ispán, D. (Créateur), Szánti-Pintér, E. (Créateur), Papp, M. (Contributeur), WOUTERS, J. (Contributeur), Tumanov, N. (Contributeur), Zsirka, B. (Créateur), Gömöry, Á. (Créateur), Kollár, L. (Créateur) & Skoda-Földes, R. (Créateur), University of Namur, 29 juin 2018
DOI: 10.5517/ccdc.csd.cc1yxyb4, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccdc.csd.cc1yxyb4&sid=DataCite
Ensemble de données
CCDC 1815278: Experimental Crystal Structure Determination
Ispán, D. (Créateur), Szánti-Pintér, E. (Créateur), Papp, M. (Contributeur), WOUTERS, J. (Contributeur), Tumanov, N. (Contributeur), Zsirka, B. (Créateur), Gömöry, Á. (Créateur), Kollár, L. (Créateur) & Skoda-Földes, R. (Créateur), University of Namur, 29 juin 2018
DOI: 10.5517/ccdc.csd.cc1yxyc5, http://www.ccdc.cam.ac.uk/services/structure_request?id=doi:10.5517/ccdc.csd.cc1yxyc5&sid=DataCite
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Contient cette citation

Ispán, Dávid ; Szánti-Pintér, Eszter ; Papp, Maté ; Wouters, Johan ; Tumanov, Nikolay ; Balázs Zsirka, Balázs ; Gömöry, Ágnes ; Kollár, László ; Skoda-Földes, Rita. / The Use of Switchable Polarity Solvents for the Synthesis of 16‐Arylidene Steroids via Claisen–Schmidt Condensation. Dans: European Journal of Organic Chemistry. 2018 ; Vol 2018, Numéro 24. p. 3236-3244.

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title = "The Use of Switchable Polarity Solvents for the Synthesis of 16‐Arylidene Steroids via Claisen–Schmidt Condensation",

abstract = "Switchable polarity recyclable solvent mixtures were applied as reaction medium and catalyst to replace the conventional base catalysts in the Claisen–Schmidt condensation of 17‐oxo steroids with aromatic aldehydes. Reversibility between ionic and nonionic forms of the new 2‐n‐butyl‐1,1,3,3‐tetramethylguanidine (nBu‐TMG)/ethylene glycol/CO2 and 2‐tert‐butyl‐1,1,3,3‐tetramethylguanidine (tBu‐TMG)/ethylene glycol/CO2 systems were proved by conductivity measurements. The structure of the ionic form was established by 1H NMR and IR measurements and by quantum chemical calculations. The steroidal products with androstane and estrane skeleton were characterised with spectroscopic methods (NMR, IR, MS).",

keywords = "Alkylcarbonate, Green chemistry, Guanidine, Ion-molecule reactions, Ionic liquids, Recyclability",

author = "D{\'a}vid Isp{\'a}n and Eszter Sz{\'a}nti-Pint{\'e}r and Mat{\'e} Papp and Johan Wouters and Nikolay Tumanov and {Bal{\'a}zs Zsirka}, Bal{\'a}zs and {\'A}gnes G{\"o}m{\"o}ry and L{\'a}szl{\'o} Koll{\'a}r and Rita Skoda-F{\"o}ldes",

year = "2018",

month = jun,

day = "29",

doi = "10.1002/ejoc.201800356",

language = "English",

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Ispán, D, Szánti-Pintér, E, Papp, M, Wouters, J , Tumanov, N, Balázs Zsirka, B, Gömöry, Á, Kollár, L & Skoda-Földes, R 2018, 'The Use of Switchable Polarity Solvents for the Synthesis of 16‐Arylidene Steroids via Claisen–Schmidt Condensation', European Journal of Organic Chemistry, VOL. 2018, Numéro 24, p. 3236-3244. https://doi.org/10.1002/ejoc.201800356

The Use of Switchable Polarity Solvents for the Synthesis of 16‐Arylidene Steroids via Claisen–Schmidt Condensation. / Ispán, Dávid; Szánti-Pintér, Eszter; Papp, Maté; Wouters, Johan ; Tumanov, Nikolay; Balázs Zsirka, Balázs; Gömöry, Ágnes; Kollár, László; Skoda-Földes, Rita.

Dans: European Journal of Organic Chemistry, Vol 2018, Numéro 24, 29.06.2018, p. 3236-3244.

Résultats de recherche: Contribution à un journal/une revue › Article › Revue par des pairs

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AU - Ispán, Dávid

AU - Szánti-Pintér, Eszter

AU - Papp, Maté

AU - Wouters, Johan

AU - Tumanov, Nikolay

AU - Balázs Zsirka, Balázs

AU - Gömöry, Ágnes

AU - Kollár, László

AU - Skoda-Földes, Rita

PY - 2018/6/29

Y1 - 2018/6/29

N2 - Switchable polarity recyclable solvent mixtures were applied as reaction medium and catalyst to replace the conventional base catalysts in the Claisen–Schmidt condensation of 17‐oxo steroids with aromatic aldehydes. Reversibility between ionic and nonionic forms of the new 2‐n‐butyl‐1,1,3,3‐tetramethylguanidine (nBu‐TMG)/ethylene glycol/CO2 and 2‐tert‐butyl‐1,1,3,3‐tetramethylguanidine (tBu‐TMG)/ethylene glycol/CO2 systems were proved by conductivity measurements. The structure of the ionic form was established by 1H NMR and IR measurements and by quantum chemical calculations. The steroidal products with androstane and estrane skeleton were characterised with spectroscopic methods (NMR, IR, MS).

AB - Switchable polarity recyclable solvent mixtures were applied as reaction medium and catalyst to replace the conventional base catalysts in the Claisen–Schmidt condensation of 17‐oxo steroids with aromatic aldehydes. Reversibility between ionic and nonionic forms of the new 2‐n‐butyl‐1,1,3,3‐tetramethylguanidine (nBu‐TMG)/ethylene glycol/CO2 and 2‐tert‐butyl‐1,1,3,3‐tetramethylguanidine (tBu‐TMG)/ethylene glycol/CO2 systems were proved by conductivity measurements. The structure of the ionic form was established by 1H NMR and IR measurements and by quantum chemical calculations. The steroidal products with androstane and estrane skeleton were characterised with spectroscopic methods (NMR, IR, MS).

KW - Alkylcarbonate

KW - Green chemistry

KW - Guanidine

KW - Ion-molecule reactions

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JO - European Journal of Organic Chemistry

JF - European Journal of Organic Chemistry

SN - 1434-193X

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ER -

The Use of Switchable Polarity Solvents for the Synthesis of 16‐Arylidene Steroids via Claisen–Schmidt Condensation

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Physico-chimie et caractérisation (PC2)

CCDC 1815277: Experimental Crystal Structure Determination

CCDC 1815278: Experimental Crystal Structure Determination

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