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Styrene phenyl oxazoline

Optimal selectivities of cinnamate aziridines are provided by the phenyl-substituted bis(oxazoline) (55d). In contrast, /ra .v-p-mcthyl styrene proved to be most selective with ferf-butyl substituted 55c and acetonitrile as solvent, Eq. 56, conditions that afford the cinnamate ester-derived aziridine in only 19% ee. Styrene is a poor substrate for this catalyst and provides the opposite antipode as the major enantiomer from the same ligand, Eq. 57. [Pg.39]

Ferrocenyl ligands, via zinc reagents, 9, 120 Ferrocenylmethyl phosphonium salts, with gold(I), 2, 274 Ferrocenylmonophosphine, in styrene asymmetric hydrosilylation, 10, 817 Ferrocenyl oxazolines, synthesis, 6, 202 Ferrocenylphosphines with chromium carbonyls, 5, 219 in 1,3-diene asymmetric hydrosilylation, 10, 824-826 preparation, 6, 197 various complexes, 6, 201 Ferrocenylselenolates, preparation, 6, 188 Ferrocenyl-substituted anthracenes, preparation, 6, 189 Ferrocenyl terpyridyl compounds, phenyl-spaced, preparation 6, 188 Ferrocifens... [Pg.106]

Improvements in the stereoselective preparation of silylcyclo-propanes (eqs 16 and 17) from aUsenes and TMSCHN2 have been reported based upon the judicious choice of catalytic metal and ligand. The mei o-tetra-p-tolylporphyrin iron(II) complex, (TTP)Fe, and TMSCHN2 convert styrene to the corresponding fra 5 -1-phenyl-2-trimethylsilylcyclopropane in 89% yield with 13 1 diastereoselectivity. The selection of [Cu(CH3CN)4]PFg and an appropriate bis(oxazoline) ligand provides highly diastereo- and enantioselective cyclopropanation of st)rene and its derivatives, albeit with compromised yield compared to other protocols. [Pg.548]

Bis-oxazolines (Box), azabis-oxazolines (azaBox) and pyridine bis-oxazoline (PyBox) with a C2 symmetry form the great majority of various oxazoline-derived ligands which are used in immobilized catalytic cyclopropanation reactions (Scheme 36). For these reactions, immobilized ruthenium and copper complexes which are able to form carbene intermediates have been tested. Most of the time, the reaction involved styrene and ethyl diazoacetate (EDA). However other alkenes (diphenyl ethylene. ..) and other diazo compounds (i.e. tertiobutyl and ethyl 2-phenyl diazoacetate) have also been investigated (Scheme 36). [Pg.72]

Only a limited number of examples of copolymers with grafted polyoxazolines are desaibed in the literature. The copolymerization of oligo(2-methyl-2-oxazoline) acrylate and methacrylate macromonomers with styrene or MMA was described by Shoda as well as the copolymerization of oligo(2-phenyl-2-oxazoline) acrylate maaomonomers with MMA. °° Weber et succeeded in the synthesis of... [Pg.533]

Poly(methyl aciylate-Z)-styrene) Poly(2-methyl-2-oxazoline-co-2-phenyl-2-oxazohne)... [Pg.729]

Radical copolymerization with styrene prodnced PS- -poly(2-phenyl-2-oxazoline) graft copolymers. Other examples of graft copol5nners prepared using macromonomers, which were synthesized by cationic pol5nnerization, are given in Table 2. [Pg.3609]

The oxazoline group has been used profitably to direct the orf/jo-alkenylation with acrylates of the linked phenyl group. The reaction occurs under mild conditions using the l,l -binaphtyl-2,2 -diyl hydrogenphosphonate (HMPAH) in methanol preferably to KOAc or K02CPh. The reaction requires less than 1 equiv. of Cu (0Ac)2.H20 but under air [(Eq. 59)] [143]. The selective mono aUcenylations with acrylates, styrenes, and acrylamide could be made. [Pg.157]

A mixture of 2-ethyl-J -oxazoline, styrene oxide, and LiGl heated 3 hrs. at 150° 5-ethyl-3-phenyl-l-aza-4,6-dioxabicyclo[3.3.0]octane. Y 61.7%. F. e.,... [Pg.91]


See other pages where Styrene phenyl oxazoline is mentioned: [Pg.180]    [Pg.473]    [Pg.184]    [Pg.216]    [Pg.217]    [Pg.822]    [Pg.894]    [Pg.19]    [Pg.70]    [Pg.529]    [Pg.181]    [Pg.756]    [Pg.756]    [Pg.6520]    [Pg.585]    [Pg.1344]    [Pg.595]    [Pg.103]   
See also in sourсe #XX -- [ Pg.148 ]




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2-Phenyl-2-oxazolines

5-Phenyl-2- -2-oxazoline

Styrene oxazoline

Styrenes phenylation

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