of glutaraldehyde with (R)-(−)-phenylglycinol and triethylphosphite to give 2-ethylphosphonate-6-oxazolopiperidine 2 which furnished in few steps (S)-(+)-piperidin-2yl-phosphonic acid (5) in 58% ee. The second strategy utilizes the 2-cyano-6-oxazolopiperidine synthon 1 which upon treatment with trimethyl phosphite gave 2-cyano-6-oxazaphosphorinane 7 which gave pure (R)-(−)-piperidin-2-yl-phosphonic
作者:Li, Bowen、Yu, Fuchao、Chen, Weijie、Seidel, Daniel
DOI:10.1021/acs.orglett.4c02037
日期:——
Unprotected alicyclic amines undergo α-C–H bond phosphonylation via a two-stage one-pot process involving the oxidation of amine-derived lithium amides with simple ketone oxidants, generating transient imines which are then captured with phosphites or phosphine oxides. Amines with an existing α-substituent undergo regioselective α′-phosphonylation. Amine α-arylation and α′-phosphonylation can be combined
SOLODENKO, V. A.;KUXAR, V. P., ZH. OBSHCH. XIMII, 57,(1987) N 10, 2392-2393
作者:SOLODENKO, V. A.、KUXAR, V. P.
DOI:——
日期:——
Solodenko, V. A.; Kukhar', V. P., Journal of general chemistry of the USSR, 1987, vol. 57, # 10, p. 2139 - 2140
作者:Solodenko, V. A.、Kukhar', V. P.
DOI:——
日期:——
Convenient Synthesis of Cyclic α-Aminophosphonates by Alkylation-Cyclization Reaction of Iminophosphoglycinates Using Phase-Transfer Catalysis
作者:Oscar Abelardo Ramírez-Marroquín、Iván Romero-Estudillo、José Luis Viveros-Ceballos、Carlos Cativiela、Mario Ordóñez
DOI:10.1002/ejoc.201501203
日期:2016.1
The alkylation reaction of diethyl N-(diphenylmethylene)aminomethylphosphonate (6) with alkyldihalides under phase-transfer catalysis followed by hydrolysis of the benzophenone imine moiety and subsequent cyclization provides a simple and convenient method for the synthesis of known and new cyclic α-aminophosphonates 1–5 in moderate to good yields.