作者:B. Chitkul、Y. Pinyopronpanich、C. Thebtaranonth、Y. Thebtaranonth、W.C. Taylor
DOI:10.1016/s0040-4039(00)79975-8
日期:1994.2
Spiro[4.4]non- and spiro[4.5]dec-2-ene-1,6-diones [2; n = 0 and 1] were prepared in moderate to high enantiomeric purities via asymmetric allylation of enamines 6 and ketal derivatives 7 and 8 formed from keto-esters 5, followed by a carbanionic cyclization process.
螺[4.4]非螺和螺[4.5]癸-2-烯-1,6-二酮[ 2 ; n = 0和1]通过烯胺6和由酮酸酯5形成的缩酮衍生物7和8的不对称烯丙基化,以中等至高对映体纯度进行制备,然后进行碳负离子环化过程。