Low Noise Amplifiers for Phased Array Feeds Sander Weinreb, California Institute of Technology
ChemInform Abstract: High-Yielding Synthesis of Weinreb Amides via Homogeneous Catalytic...
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ChemInform 2010, 41, issue 43 © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim www.cheminform.wiley-vch.de Carboxylic amides P 0320 DOI: 10.1002/chin.201043050 High-Yielding Synthesis of Weinreb Amides via Homogeneous Catalytic Carbon- ylation of Iodoalkenes and Iodoarenes. — Phosphine/palladium ratio has to be 2/1 since one equivalent of phosphine acts as a reductant of Pd(II) to Pd(0) and the other one is coordinating. Mostly high pressure of CO is required to achieve high yields of the products. In the case of (VII) an unexpected product (VIII). It is crucial to use a flame-dried apparatus to avoid hydrolysis. Heterocyclic compounds (IX), (X), (XI) fail to react. — (TAKACS, A.; PETZ, A.; KOLLAR*, L.; Tetrahedron 66 (2010) 25, 4479-4483, DOI:10.1016/j.tet.2010.04.076 ; Dep. Inorg. Chem., Janus Pannonius Univ., H-7624 Pecs, Hung.; Eng.) — Y. Steudel 43- 050
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Transcript of ChemInform Abstract: High-Yielding Synthesis of Weinreb Amides via Homogeneous Catalytic...
www.cheminform.wiley-vch.de
Carboxylic amidesP 0320 DOI: 10.1002/chin.201043050
High-Yielding Synthesis of Weinreb Amides via Homogeneous Catalytic Carbon-ylation of Iodoalkenes and Iodoarenes. — Phosphine/palladium ratio has to be 2/1 since one equivalent of phosphine acts as a reductant of Pd(II) to Pd(0) and the other one is coordinating. Mostly high pressure of CO is required to achieve high yields of the products. In the case of (VII) an unexpected product (VIII). It is crucial to use a flame-dried apparatus to avoid hydrolysis. Heterocyclic compounds (IX), (X), (XI) fail to react. — (TAKACS, A.; PETZ, A.; KOLLAR*, L.; Tetrahedron 66 (2010) 25, 4479-4483, DOI:10.1016/j.tet.2010.04.076 ; Dep. Inorg. Chem., Janus Pannonius Univ., H-7624 Pecs, Hung.; Eng.) — Y. Steudel
43- 050
ChemInform 2010, 41, issue 43 © 2010 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim
