Detail of "3558-69-8"

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Catalytic asymmetric aza Diels-Alder reactions using a chiral lanthanide Lewis acid

Catalytic asymmetric aza Diels-Alder reactions using a chiral lanthanide Lewis acid. Enantioselective synthesis of tetrahydroquinoline derivatives using a catalytic amount of a chiral source. Ishitani, Haruro; Kobayashi, Shu (Faculty Science, Science Univ. Tokyo, Tokyo 162, Japan). Tetrahedron Letters, 37(41), 7357-7360 (English) 1996 Elsevier. CODEN: TELEAY. ISSN: 0040-4039. DOCUMENT TYPE: Journal CA Section: 27 (Heterocyclic Compounds (One Hetero Atom)) In the presence of a catalytic amt. of the chiral ytterbium Lewis acid, which was prepd. from Yb(OTf)3, (R)-(+)-BINOL, diazabicyclo[5.4.0]undec-7-ene (DBU), and an additive, achiral imines reacted with achiral dienophiles to afford the corresponding tetrahydroquinoline derivs. in high yields with high diastereo- and enantioselectivities.In this experiment, several chemicals are used like 3558-69-8 This is the first example of aza Diels-Alder reactions using a catalytic amt. of a chiral source. .

Suzuki cross-couplings on aryl (heteroaryl) bromides and chlorides with bulky aliphatic phosphines/Pd(0)-triolefinic macrocyclic catalyst

All Rights Reserved.Several substances are used for example 4774-14-5 and 3558-69-8 which are their cas registry numbers. Suzuki cross-couplings on aryl (heteroaryl) bromides and chlorides with bulky aliphatic phosphines/Pd(0)-triolefinic macrocyclic catalyst. Moreno-Manas, Marcial; Pleixats, Roser; Serra-Muns, Anna ( Department of Chemistry, Universitat Autonoma de Barcelona, Barcelona 08193, Spain). Synlett, (18), 3001-3004 (English) 2006 Georg Thieme Verlag. CODEN: SYNLES. ISSN: 0936-5214. DOCUMENT TYPE: Journal CA Section: 21 (General Organic Chemistry) The combination of a bulky aliph. phosphine, e.g. tricyclohexylphosphine or the tetrafluoroborate salt of tri-tert-butylphosphine, with the Pd(0) complex of a 15-membered triolefinic macrocycle is an excellent catalyst for the Suzuki cross-coupling of aryl and heteroaryl bromides and chlorides. The palladium can be recovered in the form of the initial complex. .