Zobrazeno 1 - 10
of 158
pro vyhledávání: '"Mario Waser"'
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 20, Iss 1, Pp 1510-1517 (2024)
We herein report the oxidative α-azidation of carbonyl compounds by using NaN3 in the presence of dibenzoyl peroxide catalyzed by tetrabutylammonium iodide (TBAI). By utilizing these readily available bulk chemicals a variety of cyclic β-ketocarbon
Externí odkaz:
https://doaj.org/article/576d8b8b498f4bcc864a0efd510ccf80
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 20, Iss 1, Pp 1504-1509 (2024)
We herein report the asymmetric organocatalytic addition of azlactones to allenoates. Upon using chiral quaternary ammonium salt catalysts, i.e., Maruoka’s binaphthyl-based spirocyclic ammonium salts, the addition of various azlactones to allenoate
Externí odkaz:
https://doaj.org/article/6b59dd0b68244588b2328152c43fb90f
Autor:
Magdalena Piringer, Lotte Stockhammer, Lukas Vogl, David Weinzierl, Paul Zebrowski, Mario Waser
Publikováno v:
Tetrahedron Chem, Vol 12, Iss , Pp 100100- (2024)
Externí odkaz:
https://doaj.org/article/54aed02a0b4f41fcade6de5909042134
Autor:
Magdalena Piringer, Lotte Stockhammer, Lukas Vogl, David Weinzierl, Paul Zebrowski, Mario Waser
Publikováno v:
Tetrahedron Chem, Vol 9, Iss , Pp 100063- (2024)
Chiral Lewis base (LB) organocatalysis has emerged as a powerful covalent catalysis concept which allows for highly selective asymmetric C–C and C-heteroatom bond formations. Considering significant recent progress in the development of strategies
Externí odkaz:
https://doaj.org/article/6977b41e5fb64f36b1f1ccd86c3d61d0
Publikováno v:
ACS Organic & Inorganic Au, Vol 2, Iss 1, Pp 34-43 (2021)
Externí odkaz:
https://doaj.org/article/25a3c97b9d7347d48f62981fc56868a2
Autor:
David Weinzierl, Mario Waser
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 17, Iss 1, Pp 800-804 (2021)
We herein report a method for the kinetic resolution of racemic 4-hydroxy[2.2]paracyclophane by means of a chiral isothiourea-catalyzed acylation with isobutyric anhydride. This protocol allows for a reasonable synthetically useful s-factor of 20 and
Externí odkaz:
https://doaj.org/article/c7707fb4ef9342e9b59906b83644a9a7
Autor:
Guglielmo Monaco, Maximilian Tiffner, Antonia Di Mola, Wouter Herrebout, Mario Waser, Antonio Massa
Publikováno v:
Molecules, Vol 28, Iss 11, p 4272 (2023)
In this note, we report a correction to the published article, Molecules 2020, 25, 2272 [...]
Externí odkaz:
https://doaj.org/article/38067c889b624669aae79ee55858edd4
Autor:
Luka Ciber, Franc Požgan, Helena Brodnik, Bogdan Štefane, Jurij Svete, Mario Waser, Uroš Grošelj
Publikováno v:
Molecules, Vol 28, Iss 3, p 1515 (2023)
Ten novel bifunctional quaternary ammonium salt phase-transfer organocatalysts were synthesized in four steps from (+)-camphor-derived 1,3-diamines. These quaternary ammonium salts contained either (thio)urea or squaramide hydrogen bond donor groups
Externí odkaz:
https://doaj.org/article/ad6e50c4e17d43d5b096f6e0f4641948
Autor:
Antonia Di Mola, Giorgia Nicastro, Lorenzo Serusi, Rosanna Filosa, Mario Waser, Antonio Massa
Publikováno v:
Molecules, Vol 27, Iss 17, p 5647 (2022)
Herein, we report the application of an efficient and practical K2CO3 promoted cascade reaction of 2-acetylbenzonitrile in the synthesis of novel 3-methylated analogs of Pazinaclone and PD172938, belonging to isoindolinones heterocyclic class bearing
Externí odkaz:
https://doaj.org/article/802ecc4f35f940bca7806956c4b6e46e
Publikováno v:
Beilstein Journal of Organic Chemistry, Vol 13, Iss 1, Pp 1753-1769 (2017)
Chiral phase-transfer catalysis is one of the major catalytic principles in asymmetric catalysis. A broad variety of different catalysts and their use for challenging applications have been reported over the last decades. Besides asymmetric C–C bon
Externí odkaz:
https://doaj.org/article/35b1840d53cc4af8a714772cb20eb123