Rh(II)-Catalyzed Transannulation of <i>N</i>‑Sulfonyl-1,2,3-Triazoles with 2,1-Benzisoxazoles or 1,2-Benzisoxazoles

A Rh­(II)-catalyzed transannulation of <i>N</i>-sulfonyl-1,2,3-triazoles with 2,1-benzisoxazoles has been developed, which affords an efficient method for the synthesis of quinazoline derivatives. The transformation represents an unprecedented example which utilizes <i>N</i>-sulfonyl-1,2,3-triazole as an aza-[2C]-component in cycloadditions. Meanwhile, a Rh­(II)-catalyzed formal [3 + 2] cycloaddition of <i>N</i>-sulfonyl-1,2,3-triazoles with 1,2-benzisoxazoles is also presented, which enables the rapid synthesis of functionalized imidazole derivatives