The α-dioxenyl-allylboronate 4 allows the direct conversion of aldehydes into the 7-hydroxy-2,4-dienals (6). The latter compounds can be dehydrated to 2,4,6-alkatrienals 7 by means of the Burgess reagent or methanesulfonyl anhydride/Hünig Base.
                                    α-二氧烯基-烯丙基
硼酸盐4可直接将醛转化为7-羟基-2,4-二烯醛(6)。后者化合物可以通过Burgess试剂或甲磺酰酸酐/Hünig
碱脱水生成2,4,6-烯烃
三烯醛7。