Precursors and methods for the synthesis of mono- and difunctionalized acetylenes are described. The invention includes novel tricoordinate iodonium transfer reagents and novel alkynyldi(phenyliodonium) salts, both of which are precursors for the functionalized acetylenes. The iodonium transfer reagents take the general form of mixed iodonium sulfonates PhI.sup.+ (X)OSO.sub.2 R.sub.f, where X may be OAc, NHAc, NCO, or CN. These mixed iodonium sulfonates are produced by reaction of iodosobenzene with certain substituted trimethylsilanes. To make the alkynyldi(phenyliodonium) salt PhI.sup.+ C.tbd.CI.sup.+ Ph.cndot.2 R.sub.f SO.sub.3.sup.-,a mixed iodonium sulfonate is reacted with a bistin acetylene of the kind R'.sub.3 SnC.tbd.CSnR".sub.3. Alternatively, the reaction may be performed with disubstituted tin diacetylenes to produce PhI.sup.+ C.tbd.C-C.tbd.CI.sup.+ Ph.cndot.2 R.sub.f SO.sub.3.sup.- to produce a dialkynyldi(phenyliodonium) salt. Subsequent reaction of a nucleophile with the alkynyldi(phenyl-iodonium) salt or dialkynyldi(phenyliodonium) salt produces a difunctional acetylene or a difunctional 1,3-diyne, respectively.
本发明描述了合成单官能化和双官能化
乙炔的前体和方法。该发明包括新颖的三配位
碘转移试剂和新颖的炔基二(苯基
碘)盐,两者都是官能化
乙炔的前体。
碘转移试剂的一般形式为混合
碘酸苯PhI.sup.+ (X)OSO.sub.2 R.sub.f,其中X可以是OAc、NHAc、NCO或CN。这些混合
碘酸苯是通过
碘酰苯与某些取代的三甲基
硅烷反应而制得的。要制备炔基二(苯基
碘)盐PhI.sup.+ C.tbd.CI.sup.+ Ph.cndot.2 R.sub.f SO.sub.3.sup.-,则可以将混合
碘酸苯与一种类似R'.sub.3 SnC.tbd.CSnR".sub.3的双
锡基
炔烃反应。或者,也可以使用二取代
锡双
炔烃进行反应,以产生PhI.sup.+ C.tbd.C-C.tbd.CI.sup.+ Ph.cndot.2 R.sub.f SO.sub.3.sup.-,从而制备双炔基二(苯基
碘)盐。随后,将亲核试剂与炔基二(苯基
碘)盐或双炔基二(苯基
碘)盐反应,可以分别产生双官能
乙炔或双官能1,3-二炔。