The addition reaction R2EX + CF3C≡CCF3 → R2EC(CF3)=C(CF3)X has been investigated further (E = P and N); 1:1 adducts have been obtained from (C2H5)2PH, (CF3)2PH, (C6H5)2P—P(C6H5)2, and (CH3)2NCl, but not from (CH3)2PCl or (CH3)2P—P(CH3)2. (CF3)2PH also gives a 2:1 adduct. Triphenylphosphine causes the butyne to polymerize at − 78°. A similar but slower reaction takes place with trimethylamine. In the presence of water, trimethylamine and the butyne give the bis(butenyl) ether cis,trans (CF3CH=CCF3)2O as the major product.
已经进一步研究了加成反应R2EX + C≡C → R2
EC(
CF3)=C( )X(其中E = P和N);从(
C2H5)2PH,( )2PH,(
C6H5)2P—P( )2和(
CH3)2NCl中获得了1:1加合物,但未从( )2PCl或( )2P—P( )2中获得。 ( )2PH也会产生2:1加合物。
三苯基膦使丁炔在-78°时聚合。
三甲胺也发生类似但较慢的反应。 在
水的存在下,
三甲胺和丁炔生成双(
丁烯基)醚顺,反式( CH=C )2O作为主要产物。