Synthesis of O-Alkylbenzohydroximoyl Iodides and a Comparison of their Structures to other Oxime Derivatives
作者:Debra D. Dolliver、Smitty Smith、David B. Delatte、Kavi D. Patel、Tiffany E. Thomas、Julie Chagnard、James E. Johnson、Diana C. Canseco、Frank R. Fronczek、Clinton D. Bryan、JoAnn R. Muller、Jeffrey E. Rowe、Artie S. McKim
DOI:10.1007/s10870-007-9257-y
日期:2007.12
The first general synthesis of (Z)-O-alkylbenzohydroximidoyl iodides [ArC(I)=NOR] is reported. X-ray crystallographic structures of two of these compounds confirm that they are in the Z-configuration: p-NO2ArC(I)=NOCH3 crystallizes in space group Pnma with lattice constants a = 12.682(2) Å, b = 6.5217(15) Å, and c = 11.755(2) Å, and p-ClArC(I)=NOCH3 crystallizes in space group P21/n with lattice constants a = 15.670(4) Å, b = 5.742(4) Å, and c = 27.156(7) Å and beta angle 102.71(2). Their structures are compared to other O-alkylbenzohydroximoyl halides including p-NO2ArC(F)=NOCH3 which crystallizes in space group P21/c with lattice constants a = 3.8475(10) Å, b = 22.501(5) Å, and c = 10.088(2) Å and beta angle 91.130(11). The synthesis of two additional compounds containing the N-alkoxyimine moiety methyl (Z)-O-methyl-4-nitrobenzothiohydroximate [p-NO2ArC(SCH3)=NOCH3] which crystallizes in space group P21/n with lattice constants a = 11.8046(15) Å, b = 7.0774(10) Å, and c = 12.2741(15) Å and beta angle 100.401(9) and (Z)-O-methyl-4-nitrobenzohydroximoyl azide [p-NO2ArC(N3)=NOCH3] which crystallizes in space group P21/c with lattice constants a = 11.753(2) Å, b = 11.310(3) Å, and c = 7.351(2) Å and beta angle 103.805(15) are also reported. Their structures are compared to (Z)-ethyl benzohydroximate [PhC(OEt)=NOH] and (Z)-O-methyl-4-nitrobenzohydroximoyl cyanide [p-NO2ArC(CN)=NOCH3] respectively. Characterizations include spectrometric identifications employing IR, 1H-NMR, 13C-NMR and mass spectrometry. X-ray structures of several N-alkoxyimines, including the newly synthesized N-alkoxyimidoyl iodides and azide, have been performed, and these structures unambiguously show the geometric configuration (E vs. Z) of these compounds.
报道了 (Z)-O-烷基苯并羟基肟酰碘 [ArC(I)=NOR] 的第一个一般合成。其中两种化合物的 X 射线晶体结构证实它们处于 Z 构型:p-NO2ArC(I)=NOCH3 在空间群 Pnma 中结晶,晶格常数 a = 12.682(2) Å,b = 6.5217(15) Å,c = 11.755(2) Å,p-ClArC(I)=NOCH3 在空间群 P21/n 中结晶,晶格常数 a = 15.670(4) Å,b = 5.742(4) Å,c = 27.156 (7) Å 和 β 角 102.71(2)。它们的结构与其他 O-烷基苯并羟基肟酰卤化物进行了比较,包括 p-NO2ArC(F)=NOCH3,其在空间群 P21/c 中结晶,晶格常数 a = 3.8475(10) Å、b = 22.501(5) Å 和 c = 10.088 (2) Å 和 β 角 91.130(11)。合成另外两种含有 N-烷氧基亚胺部分的化合物甲基 (Z)-O-甲基-4-硝基苯并硫代肟酸酯 [p-NO2ArC(SCH3)=NOCH3],其在空间群 P21/n 中结晶,晶格常数 a = 11.8046( 15) Å,b = 7.0774(10) Å,c = 12.2741(15) Å 和 β 角 100.401(9) 和 (Z)-O-甲基-4-硝基苯并羟基肟酰叠氮化物 [p-NO2ArC(N3)=NOCH3]其在空间群 P21/c 中结晶,晶格常数 a = 11.753(2) Å、b = 11.310(3) Å、c = 7.351(2) Å 和 β 角 103.805(15)。将它们的结构分别与(Z)-苯并羟肟酸乙酯[PhC(OEt)=NOH]和(Z)-O-甲基-4-硝基苯并羟肟酰氰化物[p-NO2ArC(CN)=NOCH3]进行比较。表征包括采用 IR、1H-NMR、13C-NMR 和质谱的光谱鉴定。已经对几种 N-烷氧基亚胺(包括新合成的 N-烷氧基亚胺酰碘化物和叠氮化物)进行了 X 射线结构分析,这些结构明确地显示了这些化合物的几何构型(E 与 Z)。