Insertion of Ketene and Diphenylketene to the Pnictogen-Heteroatom Bonds
作者:Fumio Ando、Yoshihiko Kohmura、Jugo Koketsu
DOI:10.1246/bcsj.60.1564
日期:1987.4
Ketene and diphenylketene insert across the heteroatom-metal bond of amino-, alkoxy-, and alkylthiopnictogens, R3−nMXn, to give the corresponding α-metallated acetamides, esters, and thioesters, R3−nM(CH2COX)n and R3−nM(CPh2COX)n (M=As, Sb, Bi; X=NR2, OR, SR; n=1,3), respectively.
Reaction of the Group 15 Metalloid Amides with Diketene by 1,4-Addition Mode
作者:Fumio Ando、Ryosuke Mio、Jugo Koketsu
DOI:10.1246/bcsj.66.1998
日期:1993.7
(dialkylamino)dimethylstibines react with diketene to yield N,N-dialkyl-4-dimethylarsino-3-oxobutanamides, N,N-dimethyl-4-diphenylarsino-3-oxobutanamide, and N,N-dialkyl-4-dimethylstibino-3-oxobutanamides, respectively. These group 15 metalloid-substituted 3-oxobutanamides exist as keto-enol tautomers and the keto isomers are predominant in solution or in neat state. This reaction is the first example of 1,4-addition