F Propynal

Potassium hexacyanoferrate(III), Hydrochloric acid, 4242 f Propadiene, 1124 Propadienedithione, 1350 f Propyne, 1125... 

Ethyleneimine reacts with (p-tolylsulfonyl)acetylene to give only the (Z)-product 115 via trans addition (equation 91), while primary and secondary aliphatic amines afford ( )-products76. With nonterminal acetylenes such as l-(ethylsulfonyl)-l-propyne, the reactions of ethyleneimine, n-propylamine and f-butylamine give mixtures of ( )- and (Z)-adducts. The double conjugate addition of sodium sulfide, selenide and telluride to bis(l-propynyl)sulfone (116) produces heterocycles (117) as illustrated in equation 9277. 

F. B. Growcock and V. R. Lopp. The inhibition of steel corrosion in hydrochloric acid with 3-phenyl-2-propyn-l-ol. Corrosion Sci, 28(4) 397-410,1988. 

Ethoxy-2-propyne, 1909 f Ethyl isopropyl ether, 2012 f Ethyl propenyl ether, 1956 f Ethyl vinyl ether, 1610... 

Sitter, K.D., Andersson, A., D Haen, J., Leysen, R., Mullens, S., Maurer, F.H.J., and Vankelecom, I.F.). (2008) Silica filled poly(4-methyl-2-pentyne) nanocomposite membranes similarities and differences with poly(1 -trimethylsilyl-1 -propyne)-silica systems./. Membr. Sd., 321 (2), 284-292. 

Hatch. L.F. and Kidwell, L.E., Jr. Preparation and properties of 1-bromo-l-propyne, 1.3-dibromopropyne and l-bromo-3-chloro-l-prop3me, / Am. Chem. Soc., 76(l) 289-290, 1954. 

The pyrolysis of pyrrole produces a variety of products hydrogen cyanide, propyne, allene, acetylene, c/ -crotonitrile, and allyl cyanide, among them. Lifshitz et al. hypothesized that pyrrole undergoes 1,2-bond (N—C) cleavage, then an internal H-atom transfer, to yield a radical intermediate that can isomerize to either c/ -crotonitrile or allyl cyanide, or dissociate to HCN and propyne.Bacskay et al. completed quantum chemical comparisons of the isoelectronic pyrrolyl and cyclopentadienyl radicals they hypothesized that pyrrolyl radical is formed via C—H bond scission in the intermediate pyrrolenine (2/f-pyrrole) rather than directly via N—H bond cleavage (Fig. 14). Mackie et al. explained a similar finding, postulating that it was the formation of pyrrolenine that dictated the rate at which pyrrole pyrolysis occurred. 

AIkynyl(diisopropylsilyl)oxy-diazoacetates (295) undergo intramolecular 1,3-dipolar cycloaddition in good yield when R = H (isolation of silver pyrazolide 296 was possible) and R, R = Me,Me or (CH2)s, but no reaction occurred when R = H, R = H or R =Me (340). The silicon substimtion is apparently crucial. Replacement of the Si(i-Pr)2 in 295 (R = R = H) by Si(f-Bu)2 allowed an uncatalyzed intramolecular [3 + 2] cycloaddition to take place [xylene, 140-160 °C, 11% yield (340)], while Ag(I) catalysis led to decomposition. A diazoacetic acid (2-propyn-l-yl)oxysilyl ester also produced a bicyclic pyrazole, but in low yield. On the other hand, the same diazo compound 295, which reacted intm-molecularly under silver ion catalysis, underwent dimerization by an /nfermolecular... 

Trimethylsilylprop-2-enyl trifluoromethanesulfonate, 2843 3-Trimethylsilyl-2-propyn-1 -ol, 2489b iV-Trimethylsilyl-iV-trimethylsilyloxyacetoacetamide, 3369 Trimethylstibine, see Trimethylantimony, 1316 Trimethylsulfonium chloride, 1299 Trimethylsulfoxonium bromide, 1295 Trimethylthallium, 1317 f 2,4,6-Trimethyltrioxane, 2509 Trinitroacetonitrile, 1005... 

Some 2-carbonyl-l-propargyl-l//-indoles 159 are prepared by means of Suzuki- and Negishi-type reactions <2006OL4839>. 2-Carbonyl-1/f-indoles 158 were converted into the corresponding A -propargyl derivatives in good to excellent yield by means of PTC nucleophilic substitution in toluene/aqueous NaOH and BuaNBr as the catalyst (Equation 28). l-[l-(2-Propyn-l-yl)-12/-pyrrol-2-yl]ethanone was obtained in 86% yield by similar route. 

The thermal reactions of dihydrobenzo[c]furan 258 were studied behind reflected shock waves in a single pulse shock tube over the temperature range 1050-1300 K to lead to products from a unimolecular cleavage of 258 <2001PCA3148>. Intriguingly, carbon monoxide and toluene were among the products of the highest concentration, while benzo[f]furan, benzene, ethylbenzene, styrene, ethylene, methane, and acetylene were the other products. Trace amounts of allene and propyne were also detected. 

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