Synthesis and Some Cycloaddition Reactions of 2-(Triisopropylsilyloxy)acrolein
作者:Michael Harmata、Uday Sharma
DOI:10.1021/ol006281x
日期:2000.8.1
[reaction: see text]2-(Triisopropylsilyloxy)acrolein is easily prepared by the reaction of triisopropylsilyl triflate and 2-methoxy-2-methyl-[1,3]dioxan-5-one in the presence of triethylamine. This dienophile reacts with selected dienes in the presence of catalytic amounts of scandium triflate to afford products that are formally 4 + 3 cycloadducts. An exception is seen in the case of butadiene, where