Trans-3-Phenyl-2-propenal

Die Reduktion ungesattigter Alkohole oder Ather mit Zink/Salzsaure in Diathyliither fiihrt nicht zu einheitlichen Produkten, denn aufler der reduktiven Substitution der Hydroxy- bzw. Alkoxy-Gruppe kann Allyl-Verschiebung auftreten. Andere Substituenten (z.B. Cyan) werden z.T. mit reduziert. So wird 3-Hydroxy-1-phenyl-propen mit Zink/ Salzsaure in Diathyliither bei -20° in 78%iger Ausbeute zu einem Gemisch aus 80% 3-Phenyl-propen, 17% trans- und 3% cis-1 -Phenyl-propen2 reduziert (vgl. a.S. 726) ... 

Beilstein Handbook Reference) AI3-00949 Alkohol skoricovy BRN 1903999 CCRIS 3191 Cinnamic alcohol Cinnamyl alcohol EINECS 203-212-3 FEMA No. 2294 3-Fenyl-2-propen-1-ol HSDB 5011 NSC 8775 Peruvin 3-Phenylallyl alcohol o-Phenylallyl alcohol Phenyl-2-propen-1-ol 1-Phenylprop-1-en-3-ol 3-Phenyl-2-propen-1-ol 3-Phenyl-2-propenol 2-Propen-1-ol, 3-phenyl- 2-Propen-yl-ol, 3-phenyl- Propenoic xid, 3-phenyl-, (trans)- Styrone Styryl alcohol Styryl carbinol Zimtalcohol. Used in perfumery and in deodorants. Crystals mp = 33-35° bp 249-250° dJJ = 1.0397 soluble in H2O, organic solvents. 

Grafting a modified cinchona alkaloid to hexagonal mesoporous molecular sieve SBA-15 afforded catalyst (27) with excellent activity. 1-Phenyl-1-propene was converted to the corresponding diol in 98% yield (98% ee), while trans-stilbene yielded the desired product in 97% yield (99% ee) [92]. Other examples in this field are the utilization of microencapsulated osmium tetroxide by Kobayashi [93] and the application of continuous dihydroxylation mns in chemzyme membrane reactors described by Woltinger [94]. 

Phenyl-N-(phenylmethylene)-l-propen-1-amine 1-Propen-1-amine, 2-phenyl-N-(phenylmethylene)-, (64244-34-4), 65, 119 (E)-3-[(E)-3-Phenyl-2-propenoxy]acry1lc acid, (88083-18-5), 66, 30, 31, 36 ( )-trans-2-(PHENYLSULFONYL)-3-PHENYLOXAZIRIDINE, 66, 203, 204 1-Phenyl-1-trimethylsiloxyethylene Silane, tnmethyl[(1-phenylvinyl)oxy]-, Silane, trimethyl[(l-phenylethenyl)oxy]- (13735-81-4), 65, 6 Phosphonate synthesis, 66, 194... 

The reaction of xenon difluoride with a series of cis- and trans-phenyl substituted alkenes was examined in detail. 1,1-Diphenylethene, l,1-diphenyl-2-fluoroethene and 1.1-diphenyl-propene form vicinal 1,2-difluoro derivatives in 65 95% yield in dichloromethane solution with hydrogen fluoride as the catalyst.29-32 Two possible mechanisms were discussed.33... 

Kinetic studies by Doering and his collaborators at Harvard150-154 based on five sets of chiral 1,2-disubstituted cyclopropanes, with 1-cyano, 2-(phenyl or propen-2 -yl or -(E)-propenyl or phenylethynyl) (3) and 1 -phenyl-2-(propen-2 -yl) (4) substitution, established the ralative rotational propensities of these substituents and tested the proposition that they might be related to substituent moments of inertia. In all of these cases, the balance between one-center and two-center epimerizations from a trans isomer, reflected in (kt + k2) kl2, was fairly constant, ranging from 1.4 1 to 2.1 1. The kinetic advantages for one-center epimerizations at cyano-substituted carbons for the four cases studied were modest and not especially system-dependent the k, k2 ratios were 2.5,2.2,2.4 and 1.8, thus establishing that rotational propensities are not dictated by some simple function of the moments of inertia of substituents. 

Specific ester substrates are also hydrolyzed with carboxypeptidase A. For instance, Makinen, Fukuyama, and Kuo (27) have recently studied the enzymic hydrolysis of 0-(trans-p-ch1orocinnamoyl)-L-B-phenyl actate (CICPI.) (47),and the spin labeled nitroxide ester substrate 0-3-(2,2,5,5-tetramethylpyrrol-inyl-l-oxyl)-propen-2-oyl-L-B-phenyllactate (TEPOPL) (48). They have shown that these reactions take place via the formation of a covalent intermediate (the mixed anhydride) which can be isolated under subzero temperature conditions. The hydrolysis of CICPL and TEPOPL catalyzed by carboxypeptidase A is consequently governed by the rate-limiting breaking of the acyl-enzyme. 

From the ratios of cis- and trans-N-carbethoxy-2-methyl-3-isopropylaziri-dines (38) and (39) it was concluded that 30% of the photochemically generated nitrene was formed in the triplet state 86>. With a-methylstyrene (40), which was used as triplet trap, carbethoxynitrene does not lead to aziridines. As 1 1 adduct 3-carbethoxyamino-2-phenyl-propene-l (42) was isolated 83>, which was pre-... 

Using ammonium cerium(IV) nitrate (CAN) as the oxidant for the azide anion, the azido radicals are trapped by alkenes, to form, ultimately, /i-azido nitrates84 cerium azide species may be considered as intermediates. Alkenes conjugated with carbonyl groups are recovered intact. The stereochemistry of the adducts from acenaphthylene and indene was trans, as shown by H-NMR studies (/AX < 2 Hz for the acenaphthylene adduct), but with (-Eyi-phenyl-l-propene both syn and anti additions were formed. 

A mixture of 27.0 g (0.23 mol) of ethoxycarbonyl azide and 29 g of ( )-1 -phenyl-1 -propene is added dropwisc to 110 g of ( )-1-phenyl-1-propene at 150-160 °C. Heating and stirring are continued until N, evolution ceases (5 h). Distillation in vacuo gives a mixture of trans- and cis-3, bp 91 100 C/0.3 Torr, in 94 6 ratio, as estimated by GC analysis and comparison with authentic samples. Several fractional distillations afford almost pure tran.v-aziridinc. 

C9H9N04 ethyl 4-nitrobenzoate 99-77-4 25.00 1.2988 2 16625 C9H10O trans-3-phenyl-2-propen-1 -ol 4407-36-7 20.00 1.0440 1... 

C10H12O trans-2-methyl-3-phenyl-2-propen-1-ol 1504-55-8 502.76 44.150 2 19610 C10H12O2 4-propyl benzoic acid 2438-05-3 504.61 44.327 2... 

The hydrogenation of phenyl acetylene, over both catalysts, and 1-phenyl-1-propyne, over the carbon supported catalyst, was performed in the absence of any other species to obtain a reference reaction profile. For both phenyl acetylene and 1-phenyl-1-propyne the order of reaction was zero. In the case of the competitive reactions the reaction of equimolar quantities of trans 1-phenyl-1-propene and 1-phenyl-1-propyne, equimolar quantities of phenyl acetylene and styrene, equimolar quantities of phenyl acetylene and benzonitrile, and equimolar quantities of 1-phenyl-1-propyne and benzonitrile, were studied over the Pd/Carbon catalyst. Only the equimolar reaction of phenyl acetylene and styrene was examined over the Pd/Zr02 catalyst (Figure 1). The same data for the Pd/Carbon catalyst is plotted in Figure 2. In each case 0.4 ml of each reactant was charged to the reactor at 303 K, and the reaction followed over a 1 h period. The effect of the co-adsorbates on activity is shown in Table 1. While the effect on selectivity is shown in Table 2. 

The 1-phenyl-1-propyne /trans 1-pheny-l-propene couple behave in a classical marmer with the alkyne being more strongly adsorbed and hence blocking the surface for the alkene. 

Bromohydrins. Dalton et al. have prepared bromohydrins by reaction of olefins with NBS in aqueous DMSO. The reaction involves stereospecific Markownikoff addition thus trans-1 -phenyl-1 -propene is converted into erythro-2-bromo-1 -phenylpropanol in 92% yield. The exact nature of the reagent is not... 

Yollkommen stereospezifisoh wird das Kopf/Kopf-Dimere t-3,t-4-Dimethyl-r-l,c-2-bis- 4-methoxy-phenyl -cyclobutan (XI 39%d.Th. F 53°) aus trans-l-(4-Methoxy-phenyl)-propen-(I) (Anet.hol) in Cyclohexan gewonnen1. Aus diesem laBt sich mit Natrium in ftiissigem Ammoniak bequem meso-2,3-Dimethyl-1,4-bis- 4-methoxy-phenyl]-butan (XII 82% d.Th. F 99-100°,) syntketisieren. 

Die Belichtung (A = 254 nm) einer 0,1 molaren benzolischen Losung von trans-1,3-Diphenyl-propen (I, S.420) bei 40° ergibt in jeweils 6% Ausbeutecis- und trans-l,2-Di-phenyl-cyclopropan (Vie und VIt) neben ci -l,3-Diphenyl-propen (IV) und 1-Phenyl-indan (V)3. Zur Bildung der Cyclopropane VI ist entweder eine 1,2-Wasserstoff- (Fall A) Oder eine... 

Dimethyl-6- phenyl-hcpto- dien-(2,4) ds- und trans-3,3-Dimethyl-2-[2-rnethyl-propen-(l)-yl]-l-phenyl-cydo- pro-pan (cis-.trans =1 9) 90 2,3... 

Hydroxy-3-phenyl- (zu 82% d.Th.) und 3-Methoxy-3-phenyl-propen (zu 84% d.Th.) liefem analog 3-Phenyl-propen, trans- und cis-1 -Phenyl-propen (in beiden Fallen im Verhaltnis 80 17 3). Benzyliden-cyclohexan und 1 -Benzyl-cyclohexen sind auf fol-gendera Wege zuganglich1 ... 

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