中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
乙炔基(二苯基)膦 | ethynyldiphenylphosphine | 6104-47-8 | C14H11P | 210.215 |
—— | Trimethylsilyl-diphenyl-phosphinoacetylen | 21037-91-2 | C17H19PSi | 282.397 |
中文名称 | 英文名称 | CAS号 | 化学式 | 分子量 |
---|---|---|---|---|
—— | diphenyl(1-propynyl)phosphine oxide | 6224-95-9 | C15H13OP | 240.241 |
—— | (bromoethynyl)diphenylphosphine oxide | 1151546-49-4 | C14H10BrOP | 305.111 |
—— | 1,3-bis(diphenylphosphorylethynyl)benzene | 7608-36-8 | C34H24O2P2 | 526.511 |
—— | ((3-ethynylphenyl)ethynyl)diphenylphosphine oxide | 1351165-68-8 | C22H15OP | 326.334 |
—— | ((4-bromophenyl)ethynyl)diphenylphosphine oxide | 1351165-66-6 | C20H14BrOP | 381.208 |
—— | ((3-bromophenyl)ethynyl)diphenylphosphine oxide | 1510838-18-2 | C20H14BrOP | 381.208 |
—— | 4-[2-[3-(2-Diphenylphosphorylethynyl)phenyl]ethynyl]benzonitrile | 1510838-19-3 | C29H18NOP | 427.442 |
—— | (E)-2-diphenylphosphoryl-N,N-diethylethenamine | 89217-96-9 | C18H22NOP | 299.353 |
—— | 3-(4-methoxyphenylethynyl)phenylethynyldiphenylphosphine oxide | 1351165-79-1 | C29H21O2P | 432.458 |
A one-pot reaction between C2F5CH2NH2·HCl, NaNO2 and electron-deficient alkynes gives C2F5-substituted pyrazoles in excellent yields. The transformation smoothly proceeds in dichloromethane/water, tolerates the presence of air, and requires no purification of products by column chromatography. Mechanistically, C2F5CH2NH2·HCl and NaNO2 react first in water to generate C2F5CHN2, that participates in a [3 + 2] cycloaddition with electron-deficient alkynes in dichloromethane.