A New and Efficient Synthesis of α-Amino Cycloalkyl-Phosphonic AcidsviaElectrophilic Azidation of Cycloalkylphosphonates
摘要:
alpha-Amino cyclobutyl-, cyclopentyl- and cyclohexylphosphonic acids (13) were efficiently prepared from the related unsubstituted cycloalkphosphonates (5), in three steps including electrophilic azidation of the corresponding lithiated carbanions, hydrogenation of the intermediate alpha-azido cycloalkyl-phosphonates (10) and acidic hydrolysis of the resulting alpha-amino cycloalkyl-phosphonates (12).
A phosphorylation of alkenyl and aryl C–O bonds at room temperature via photoredox/nickel dual catalysis is reported. By starting from easily available and inexpensive sulfonates, a variety of important alkenyl phosphonates and aryl phosphine oxides are generated in moderate to excellent yields. This method features mild reaction conditions, high selectivity, good functional group tolerance, wide substrate
Facile Solid‐Phase Synthesis of Cycloalkylphosphonates and 1‐Cycloalkenylphosphonates Using Polymer‐Supported Phenylsulfonylmethylphosphonates
作者:Xiao‐Ling Liu、Shou‐Ri Sheng、Wei Zhou、Qin‐Ying Wang、Xiao‐Lan Zhang、Bin Gong
DOI:10.1080/00397910600978515
日期:2007.1.1
Abstract A facile procedure for the solid‐phasesynthesis of cycloalkylphosphonates and 1‐cycloalkenylphosphonates in good yields and high purities using polystyrene‐supported phenylsulfonylmethylphosphonates with traceless sulfone linker strategy is described.
Romakhin; Kosachev; Zagumennov, Russian Journal of General Chemistry, 1997, vol. 67, # 2, p. 227 - 234
作者:Romakhin、Kosachev、Zagumennov、Nikitin
DOI:——
日期:——
Conversion of Cyclic Vinyl Sulfones to Transposed Vinyl Phosphonates
作者:Mohammad N. Noshi、Ahmad El-awa、Eduardo Torres、Philip L. Fuchs
DOI:10.1021/ja072890p
日期:2007.9.1
Functionalized cyclic vinyl sulfones were directly converted to the "polarity reversed" vinyl phosphonates through an efficient one pot procedure. Ozonolysis of these vinyl sulfones and vinyl phosphonates furnish complementary sets of termini-differentiated ester-aldehydes. This strategy has been applied for preparation of segments needed for the synthesis of Aplyronine A. The scope and limitations of this transformation were defined.