F Buten-3-yne

Ammonium hexacyanoferrate(II), 2577 f Arsine, 0100 Azido-2-butyne, 1473 3-Azidopropyne, 1114 c /.v-A/obcn/cnc, 3484 Azoxybenzene, 3485 Barium azide, 0214 Benzenediazonium nitrate, 2275 Benzotriazole, 2269 Borane, 0135 Bromine azide, 0256 f 3-Bromopropyne, 1090 f 1,2-Butadiene, 1479 f 1,3-Butadiene, 1480 f Buten-3-yne, 1423 f 1-Butyne, 1481 f 2-Butyne, 1482 Cadmium azide, 3957 Cadmium cyanide, 0588 Cadmium fulminate, 0589 Cadmium nitride, 3960... 

Bis-(2-methoxyethyl) ether, 2549 f 1,3-Butadiene, 1480 f 1,3-Butadiyne, 1385 f 2-Butanol, 1695 f Buten-3-yne, 1423 f Butyl ethyl ether, 2540 f Butyl vinyl ether, 2484 f 2-Chloro-1,3-butadiene, 1451 f Chloroethylene, 0730 f 2-Chloroethyl vinyl ether, 1557... 

Diethylamino-1 -buten-3-yne, 3015 3-Diethylaminopropylamine, 2872a Diethylaminosulfinyl chloride, 1673 Diethylaminosulfur trifluoride, 1678 2-Diethylammonioethyl nitrate nitrate, 2566 Diethylarsine, 1714 Diethylberyllium, 1669 Diethylbismuth chloride, 1670 Diethylcadmium, 1671 f Diethyl carbonate, 1975... 

Vanillin, see 4-Hydroxy-3-methoxybenzaldehyde, 2953 f Vinylacetylene, see Buten-3-yne, 1419 Vinyl azide, 0766... 

BUTEN-3-YNE (689-97-4) Flammable gas (flash point <23°F/<—5°C). Unless inhibited, forms unstable peroxides with atmospheric oxygen or air. Heat, sunlight, oxygen, 1,3-butadiene, peroxides, oxidizers can cause explosive decomposition or polymerization. Forms sensitive and highly unstable metal acetylides with silver, cobalt, copper, magnesium, mercury, and their alloys. 

A soln. of 23 g. l-methoxy-l-buten-3-yne in abs. ether allowed to react at -60° under Ng with a soln. of z-butyllithium in hexane, the resulting soln. added dropwise at -60° to a soln. of 33 g. acetic anhydride in abs. ether, stirring continued 0.5 hr. at -60°, and allowed to warm to room temp. 21 g. 6-methoxy-5-hexen-3-yn-2-one. F. e. s. R. Finding, G. Zimmermann, and U. Schmidt, M. 102, 214 (1971). 

Negishi, E.-i. Zeng, F. ( )-l-Bromo-4-trimethylsilyl-l-buten-3-yne e-EROS Encyclopedia of Reagents for Organic Synthesis, 2001. 

Base-Catalysed Isomerization of l-(lV,lV-Diethylai no)-4-buten-2-yne to l-f/ y-Diethybinino)-3-btsten-l-yne... 

Authentic sample of Methyl-2 butene-1 yne-3 was obtained by dehydration of DMEC [9]. This product present some safety problems Eb76o 33°C - AH°f = 53 kcal/mole -ACD 320 cal/g at 200°C). Isoprenal was obtained using the litterature procedure [10]. Other products are commercial from PROLABO, ALDRICH and RHONE-POULENC ANIMAL NUTRITION. Isopropenyl methylcetone was obtained by aldolisation - deshydration [11]. 

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