Disclosed embodiments relate to improved methods for the synthesis of activated fumarate intermediates and their use in chemical synthesis. Disclosed embodiments describe the synthesis of activated fumarate esters including those derived from activating groups including: 4-nitrophenyl, diphenylphosphoryl azide, pivaloyl chloride, chlorosulfonyl isocyanate, p-nitrophenol, MEF, trifluoroacetyl and chlorine, for example, ethyl fumaroyl chloride and the subsequent use of the activated ester in situ. Further embodiments describe the improved synthesis of substituted aminoalkyl-diketopiperazines from unisolated and unpurified intermediates allowing for improved yields and reactor throughput.
揭示的实施例涉及改进的方法,用于合成活性
富马酸中间体,并将其用于
化学合成。揭示的实施例描述了活化
富马酸酯的合成,包括那些来自激活基团的酯,例如:4-
硝基苯基、
二苯基磷酸酰
叠氮化物、皮瓦酰
氯、
氯磺酰异氰酸酯、
对硝基苯酚、MEF、三
氟乙酰和
氯等,例如,乙酰基富马酰
氯和随后在原位使用活化酯。进一步的实施例描述了从未分离和未纯化的中间体改进合成取代
氨基烷基二酮
哌嗪,从而实现了更高的产量和反应器吞吐量。