In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called N-Heterocyclic Carbene Stabilized 1-Bora-1,3-butadienes, published in 2021-12-22, which mentions a compound: 141556-42-5, mainly applied to allyl borenium cation preparation deprotonation; crystal structure carbene borabutadiene zwitterionic boreniumborate enolate enamide methylboraallylrhodium; mol structure carbene borabutadiene zwitterionic boreniumborate enolate enamide methylboraallylrhodium; carbene borabutadiene preparation hydroboration reaction crystal structure; zwitterionic boreniumborate enolate enamide preparation crystal structure; methyl boraallyl rhodium complex preparation crystal structure, Synthetic Route of C21H24N2.
Deprotonation of [(NHC)(Fmes)B-allyl]+ borenium cations (NHC: IMes (a)or IMe2 (b); Fmes: 2,4,6-(CF3)3C6H2) provides an easy entry to the NHC-stabilized 1-bora-1,3-butadienes. They feature a planar s-trans-conformation just like 1,3-butadiene. The 1-borabutadiene 7a undergoes hydroboration reactions; the HB(C6F5)2 hydroboration product is trapped with CO or an isonitrile to give the resp. zwitterionic borenium-borate enolate or enamide products. 1-Borabutadiene 7b undergoes 1,4-chalcogenation with element S or Se, and it gives the six-membered heterocyclic 1,4-addition product with a S = O bond of SO2. Compound 7b served as a precursor for the formation of a borylated η3-allyl ligand at Ru. 7B formed a Rh complex by reaction with [Rh(ethylene)2Cl]2. It subsequently underwent an intramol. C-H activation reaction to a mixture of η3-methyl-boraallyl Rh complex isomers.
After consulting a lot of data, we found that this compound(141556-42-5)Synthetic Route of C21H24N2 can be used in many types of reactions. And in most cases, this compound has more advantages.
Reference:
Indole alkaloid derivatives as building blocks of natural products from Bacillus thuringiensis and Bacillus velezensis and their antibacterial and antifungal activity study,
Preparation of Indole Containing Building Blocks for the Regiospecific Construction of Indole Appended Pyrazoles and Pyrroles