Novel 1-phosphonyl radicals derived from 1-mono and 1,1-di-heterosubstituted 2-oxoalkylphosphonates as useful phosphoroorganic intermediates in organic synthesis
作者:Piotr Balczewski
DOI:10.1016/s0040-4020(96)01122-2
日期:1997.2
Novel 1-phosphonyl radicals 17 were obtained from 1-mono(Y=H, X=Cl, Br, SMe) and 1.1-di (Y=X=Cl) hetero substituted 2-oxoalkylphosphonates 16 under the reductive conditions () and utilized in the reactions with alkenes for the free-radical synthesis of highly functionalized phosphonates 19 and 20. The utility of the new approach has been demonstrated by the synthesis of methylenomycin B 13, a cyclopentanoid
新的1-膦酰基17从1-单获得的(Y = H,X =氯,溴,SME)和1.1二(Y = X = Cl)的杂取代的2- oxoalkylphosphonates 16的在还原条件下()和利用在与烯烃的反应中,自由基合成高度官能化的膦酸酯19和20。通过使用膦酸酯19d合成环戊烷类抗生素甲基新霉素B 13以及合成4-二乙氧基磷酰基-2,3-二氢呋喃22和2-二乙氧基磷酰氧基庚烷-5 ,证明了这种新方法的实用性。-一23。