Oxidative Deamination of α-Aminophosphonates and Amines by Zinc Dichromate Trihydrate (ZnCr2O7˙3H2O) under Solvent-Free Conditions at Room Temperature
作者:Sara Sobhani、Mahdi Maleki
DOI:10.1055/s-0029-1219174
日期:2010.2
A novel method for the rapid and efficient conversion of a variety ot α-aminophosphonates to α-ketophosphonates using ZnCr 2 O 7 ·3H 2 O viaoxidativedeamination under solvent-free conditions at room temperature is described. This method is also applicable to the rapid and highly selective oxidation of various types of ordinary amines (primary and secondary) to aldehydes and ketones in good to high
描述了一种使用 ZnCr 2 O 7 ·3H 2 O 在室温下无溶剂条件下通过氧化脱氨基快速有效地将多种 α-氨基膦酸酯转化为 α-酮膦酸酯的新方法。该方法也适用于各种类型的普通胺(伯胺和仲胺)以良好到高产率快速和高选择性氧化成醛和酮。
Synthesis of Acylphosphonates by a Palladium-Catalyzed Phosphonocarbonylation Reaction of Aryl Iodides with Phosphites
作者:Yusuke Masuda、Naoki Ishida、Masahiro Murakami
DOI:10.1002/asia.201403260
日期:2015.2
Acylphosphonates are conveniently synthesized from aryl iodides by a palladium‐catalyzed reaction with dialkyl phosphites under an atmosphericpressure of carbonmonoxide. The reaction demonstrates the first example of the use of phosphorus nucleophiles in related metal‐catalyzed carbonylation reactions.
Hydrophosphonylation of aldehydes catalyzed by cyclopentadienyl ruthenium(II) complexes
作者:Ivânia R. Cabrita、Pedro R. Florindo、Paulo J. Costa、M. Conceição Oliveira、Ana C. Fernandes
DOI:10.1016/j.mcat.2018.03.001
日期:2018.5
This work reports the first method for the synthesis of α-hydroxyphosphonates from aldehydes catalyzed by cyclopentadienyl ruthenium(II) complexes. The best results were obtained using the system HP(O)(OEt)2/[RuClCp(PPh3)2] (5 mol%), affording the α-hydroxyphosphonates in good to excellent yields with high chemoselectivity. The catalyst [RuClCp(PPh3)2] can be used for at least 12 catalytic cycles with
Enantioselective vinylogous aldol reaction of acylphosphonates with 3-alkylidene oxindoles
作者:Manish K. Jaiswal、Sanjay Singh、Ravi P. Singh
DOI:10.1039/d1ob00140j
日期:——
phosphonates has been described. The hydrogen bonding ability of the bifunctional thiourea catalyst allows simultaneous dual activation of a vinylogous oxindole nucleophile and an acylphosphonate electrophile, affording hydroxyphosphonato-3-alkylidene-2-oxindoles as aldol adducts in high yields (up to 92%) with excellent stereocontrol (up to 99% ee).
Highly diastereoselective vinylogous Mukaiyama aldol reaction of α-keto phosphonates with 2-(trimethylsilyloxy)furan catalyzed by Cu(OTf)2
作者:Jipan Yu、Xiaona Zhao、Zhiwei Miao、Ruyu Chen
DOI:10.1039/c1ob05822c
日期:——
achieved via a vinylogous Mukaiyamaaldolreaction. The reaction was performed using α-ketophosphonate 1 and 2-(trimethylsilyloxy)furan 2 mediated by Cu(OTf)2 and 2,2,2-trifluoroethanol as additive in CH2Cl2. The reaction proceeds rapidly and affords the corresponding 5-(hydroxy(aryl)methyl) furan-2(5H)-one phosphonates 3 in high yields with good to excellent diastereoselectivities (d.r. up to >99 : 1)