Development of novel key reagent for synthesis of multiple bond of heavier group main group elements.

作者希望描述含14族原子的三阴离子和四阴离子在温和条件下的反应性控制。当要在多功能化合物中的一个（两个或三个）位点选择性地进行化学反应时，必须暂时阻断其他反应位点。我设计了一种新型元素，它的原子上有几个保护基团。阴离子的数量容易控制取决于元素上的试剂或触发基团的种类。我们可以很容易地在元素上产生新的四个键。该策略可能适用于合成更复杂的双键体系，如乙烯基锂和含有14族元素的1,1-二硫代二元烯的较重类似物。

The author wishes to describe control of reactivity of tri- and tetraanions containing group 14 atom in the mild condition. When a chemical reaction is to be carried out selectively at one (two or three) site in a multifunctional compound, other reactive sites must be temporarily blocked. I design a new type of element, which has a several protective groups on the atom. A number of anion is easy to control depend on the kind of reagents or trigger groups on the element. We can easy to create new four bonds on the element. The strategy might be applicable for synthesis of more intricate doubly-bonded systems such as heaver analogues of vinyllithium and 1,1-dilithio-dimetalene containing group 14 elements.