We demonstrate that a bulky cyclic amino ligand, specifically 1,1,3,3-tetraphenylisoindolinyl, can facilitate the formation of a transient stannyne, endowed with adjacent ambiphilic carbon and tin centers. This stannyne, manifesting carbene-like behavior, engages in an unprecedented sequence of reactions, including Buchner ring expansion, [1,3]sigmatropic, and [1,5]-sigmatropic shifts, culminating in the synthesis of a stable cyclic (alkyl)(amino)stannylene. This compound represents the first tin analogue of the well-known cyclic (alkyl)(amino)carbenes. Both the bonding configuration and the formation process of this stannylene are thoroughly analyzed through quantum chemical computations. Our findings pave the way for further synthesis of unusual main group species using bulky isoindolinyl substituents, emphasizing their potential as a versatile tool in synthetic chemistry.

我们证明，大的环状氨基配体，特别是1,1,3,3-四苯基异吲哚啉基，可以促进瞬时甲锡炔的形成，并具有相邻的两亲性碳和锡中心。这种士丹炔表现出类似卡宾的行为，参与前所未有的一系列反应，包括布氏环膨胀、[1,3]sigmatropic 和 [1,5]-sigmatropic 位移，最终合成稳定的环状（烷基） (氨基)亚锡。该化合物代表了众所周知的环状（烷基）（氨基）卡宾的第一个锡类似物。通过量子化学计算，对这种亚锡烯的键构型和形成过程进行了彻底的分析。我们的研究结果为使用庞大的异吲哚啉基取代基进一步合成不寻常的主族物种铺平了道路，强调了它们作为合成化学中通用工具的潜力。