What is 8-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1,4-dioxaspiro[4.5]dec-7-ene (CAS: 680596-79-6)?

8-(4,4,5,5-Tetramethyl-1,3,2-dioxaborolan-2-yl)-1,4-dioxaspiro[4.5]dec-7-ene is a cyclic boron-containing organic compound with the CAS number 680596-79-6. It features a spiro-ring structure with a 1,3,2-dioxaborolane moiety and a 1,4-dioxaspiro[4.5]decane backbone. It is commonly used as a boron reagent in organic synthesis, particularly in coupling reactions.