Trans-2-Butene oxide

BUTANAL, l-d—2-METHYL-, 51, 31 erythro-2,3-Butanediol monomesylate, by reaction of trans-2-butene oxide with methanesulfonic acid, 51, 11 3,5,1,7-[1,2,3,4]Butanetetrayl-naphthalene, decahydro-, 53, 30... 

Butene, 4-chloro-, 53, 119 trans-2-Butene oxide, from... 

Another interesting monomer for copolymerisation with carbon dioxide is isomeric 2-butene oxide. In copolymerisation in a ternary comonomer system consisting of 2-butene oxide, 1-butene oxide and carbon dioxide with the diethylzinc-water catalyst, m-2-butene oxide was incorporated in the copolymer, while trans-2-butene oxide hardly underwent an enchainment [230]. Thus, the smaller steric hindrance for the r/.v-isomer than for the irans-isomer throughout the coordination copolymerisation with carbon dioxide is to be taken into account. 

Poly(octene oxide) Poly(trans-2-butene oxide) Poly(styrene oxide) Poly(3-methoxypropylene oxide) Poly(3-butoxypropylene oxide) Poly(3-hexoxypropylene oxide) Poly(3-phenoxypropylene oxide) Poly(3-chloropropylene oxide) Poly[2,2-bis(chloromethyl)... 

Comparison of activation enthalpies for neutral hydrolysis of substituted oxi-ranes (propene oxide and butane oxides) [53] clearly demonstrates the preference of Beta pathways corresponding to the attack of water molecule on more substituted carbon atom (Fig. 10.13). Activation enthalpies lowering has been ascertained in the series ethene oxide>trans-2-butene oxide cis-2-butene oxide propene oxide > isobutene oxide. 

The activating effect of electron donor groups, such as methyl groups, Is also shown by the polymerization of els- and trans-2-butene oxides. Vandenberg used these monomers to offer the first proof that the ring opening reaction in cationic polymerization proceeded with clean Inversion of configuration (22). 

Abb. 20. Zusammenhang der Konfiguration von Monomerem und Poly-merem bei der Polymerisation von cis- und trans-Buten-2-oxid die Polymerisation erfolgt unter Konfigurationsumkehr... 

XXXVI trans-Buten-2-oxid teilweise hydrolysierte metallorganische Verbindung von Al, Zn, Mg bei—78°C erythro-di-isotaktisch (99,100,102)... 

The initially formed biradicals are probably very short-lived. Tiffs is shown by the lack of effect of molecular oxygen and especially by the fact that not equal ratios of czs- and trans-fi-butene oxide are obtained from czs- and (repoxide ring must be comparable in magnitude to the... 

Fig. 15.43. Isoxazoline formation by way of a 1,3-dipolar addition of an in situ generated nitrile oxide to trans-butene.

In the large mqority of the cationic polymerizations of heterocycles the propaption step proceeds with complete inversion of conf uration. Ihis vras diown for the first time by Vandenberg in the polymerization of ds- and trans-2,3-butene oxides as... 

In the polymerization of cis- and trans-23-butene oxides, stereoreplar polymers are obtained by a low-tenqierature cationic proc ... 

For trans-2,3-butene oxide and trans-l,4-dichloro-23-butere oxide, in order to understand the formation of disyndtotactic polymers, it is sufficient to assume a stereoselective process, i. e. that the active species selects a moncmia with a stereochemistry resembling its own Two different notattons are used in (xrder to conform with original papers... 

The polymerization of cis oxides gives, in contrast to trans monomers, polymers of different stereochemistry, namely cis-2,3-butene oxide forms racemic (RR, SS) disyndiotactic polymers whereas cis-1,4-dichloro-2,3-butene oxide gives racemic mixtures of (RR, RR) and (SS, SS) diisotactic polymers. 

Tuesday, C. S., The Atmospheric Photo-oxidation of Trans-Butene-2 and... 

In the oxidation of trans-butene-2 at 673 to 773 K, an unacceptable rate constant ratio of ki Jk p 150 is required unless a radical branching reaction is introduced [92]. The sequence below is consistent with the kinetic results. 

Initial yields " of products from propene and trans-butene-2 oxidations at 753 K [36,92]... 

Detailed modelling studies of the oxidations of propene, trans-butene-2 and isobutene have been carried out [111] for the temperature range 650-800 K, and the yields of aldehydes and ketones formed as above are consistent with mechanism proposed. 

Substrates GSTM1 -1—Trans-stilbene oxide, DCNB-high, CDNB-mod-erate, Aflatoxin Bl-exo 8,9-epoxide, androstene 3,17-dione, B(a)P-diol epoxide, B(fl)P-4,5-oxide, chrysene diol epoxide, cumene hydroperoxide, ethacrynic acid, -nitrophenyl acetate, PGA2, PGJ2, styrene 7,8-oxide, fran5-4-phenyl-3-buten-2-one. 

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