Zobrazeno 1 - 10
of 94
pro vyhledávání: '"Alexander Kremsmair"'
Autor:
Alisa S. Sunagatullina, Andreas Hess, Alexander Kremsmair, Yifan Li, Yi-Hung Chen, Paul Knochel
Publikováno v:
Angewandte Chemie.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1d6c2001dfdfc73ac741b68f85831887
https://doi.org/10.1002/ange.202304445
https://doi.org/10.1002/ange.202304445
Autor:
Alexander Kremsmair, Henrik R. Wilke, Johannes H. Harenberg, Benjamin R. G. Bissinger, Matthias M. Simon, Nurtalya Alandini, Paul Knochel
Publikováno v:
Angewandte Chemie. 135
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::47bd791e972d018eec9653bad01d6048
https://doi.org/10.1002/ange.202214377
https://doi.org/10.1002/ange.202214377
Autor:
Alexander Kremsmair, Henrik R. Wilke, Johannes H. Harenberg, Benjamin R. G. Bissinger, Matthias M. Simon, Nurtalya Alandini, Paul Knochel
Publikováno v:
Angewandte Chemie (International ed. in English).
We report a practical in situ quench (ISQ) procedure involving the generation of chiral secondary alkyllithiums from secondary alkyl iodides (including functionalized iodides bearing an ester or a nitrile) in the presence of various electrophiles suc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8073e683dbb82ca03e1a068f83da4b55
https://pubmed.ncbi.nlm.nih.gov/36269064
https://pubmed.ncbi.nlm.nih.gov/36269064
Publikováno v:
Encyclopedia of Reagents for Organic Synthesis. :1-5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2810433138a78ad1d2d89db9f0cf733a
https://doi.org/10.1002/047084289x.rn02373
https://doi.org/10.1002/047084289x.rn02373
Autor:
Alexander Kremsmair, Paul Knochel, Christoph Joachim Benedikt Seifert, Simon Graßl, Edouard Godineau
Publikováno v:
Synthesis. 53:4068-4074
Various substituted and unsubstituted N-heteroaryl chlorides have been converted into their corresponding organozinc species using zinc dust in the presence of zinc pivalate and 10% CoCl2 in benzonitrile at 25 °C. The resulting heteroarylzinc reagen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b55a7e51d631b73633a18b5ffd676215
https://doi.org/10.1055/a-1534-0624
https://doi.org/10.1055/a-1534-0624
Autor:
Alexander Kremsmair, Alisa S. Sunagatullina, Leonie J. Bole, Pasquale Mastropierro, Simon Graßl, Henrik R. Wilke, Edouard Godineau, Eva Hevia, Paul Knochel
Publikováno v:
Kremsmair, Alexander; Sunagatullina, Alisa S.; Bole, Leonie J; Mastropierro, Pasquale; Graßl, Simon; Wilke, Henrik R.; Godineau, Edouard; Hevia, Eva; Knochel, Paul (2022). Exploiting Coordination Effects for the Regioselective Zincation of Diazines Using TMPZnX⋅LiX (X=Cl, Br). Angewandte Chemie International Edition, 61(40), e202210491. GDCh 10.1002/anie.202210491
A new method for regioselective zincations of challenging N-heterocyclic substrates such as pyrimidines and pyridazine was reported using bimetallic bases TMPZnX⋅LiX (TMP=2,2,6,6-tetramethylpiperidyl; X=Cl, Br). Reactions occurred under mild condit
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::07aa595137d1137781e7dbea5860be74
https://pubmed.ncbi.nlm.nih.gov/35943036
https://pubmed.ncbi.nlm.nih.gov/35943036
Publikováno v:
Chemical Science
Polyfunctional organometallics of magnesium and zinc are readily prepared from organic halides via a direct metal insertion in the presence of LiCl or a Br/Mg-exchange using iPrMgCl·LiCl (turbo-Grignard) or related reagents. Alternatively, such func
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::108dcb36a2132f0d6d6494cadde3fded
https://doi.org/10.1039/d1sc00685a
https://doi.org/10.1039/d1sc00685a
Autor:
Juri Skotnitzki, Franziska Schüppel, Alexander Kremsmair, Paul Knochel, Daniel Keefer, Regina de Vivie-Riedle, Brieuc Le Cacher de Bonneville
Publikováno v:
Chemical Science
The diastereoselective SN2′-substitution of secondary alkylcopper reagents with propargylic phosphates enables the preparation of stereodefined alkylallenes. By using enantiomerically enriched alkylcopper reagents and enantioenriched propargylic ph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7f1b6433311c488765ff2b624e71705f
http://europepmc.org/articles/PMC8159386
http://europepmc.org/articles/PMC8159386
Publikováno v:
Synthesis. 52:873-881
Chiral secondary mixed alkylcopper-zinc reagents were prepared from the corresponding alkyl iodides and reacted with allylic epoxides via an anti-SN2′-substitution and retention of configuration of the chiral alkylorganometallic, leading to chiral
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::537ba14ca5a7b31be74f5d559223a94d
https://doi.org/10.1055/s-0039-1690766
https://doi.org/10.1055/s-0039-1690766
Autor:
Matthias Simon, Quirin Schmidt, Paul Knochel, Konstantin Karaghiosoff, Alexander Kremsmair, Henrik R. Wilke
Publikováno v:
Chemical Science
A general preparation of enantiomerically and diastereomerically enriched secondary alkylmagnesium reagents was reported as well as their use for performing highly stereoselective transition-metal free electrophilic aminations leading to α-chiral am
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a6134598e47364ffcd9b9cbd78cfa26
https://pubmed.ncbi.nlm.nih.gov/35059149
https://pubmed.ncbi.nlm.nih.gov/35059149