已开发出对苯并[ a ]-和吲哚并[2,3- a ]喹啉联苯胺的对映选择性两步法。它由(i)外消旋或前手性δ-氧代(二)酯与(S)-(3,4-二甲氧基苯基)丙氨醇或(S)-色氨酸的立体选择性环缩合反应涉及动态动力学拆分和/或对映体或非对映体酯基的区分,和(ii)随后利用所得恶唑并哌啶酮内酰胺中存在的被掩蔽的N-酰基亚氨基亚胺离子在芳环上进行立体控制环化。
已开发出对苯并[ a ]-和吲哚并[2,3- a ]喹啉联苯胺的对映选择性两步法。它由(i)外消旋或前手性δ-氧代(二)酯与(S)-(3,4-二甲氧基苯基)丙氨醇或(S)-色氨酸的立体选择性环缩合反应涉及动态动力学拆分和/或对映体或非对映体酯基的区分,和(ii)随后利用所得恶唑并哌啶酮内酰胺中存在的被掩蔽的N-酰基亚氨基亚胺离子在芳环上进行立体控制环化。
Enantioselective Synthesis of Spiro[indolizidine-1,3′-oxindoles]
作者:Maria Pérez、Carlos Ramos、Lucia Massi、Silvia Gazzola、Chiara Taglienti、Nihan Yayik、Elies Molins、Antonio Viayna、F. Javier Luque、Joan Bosch、Mercedes Amat
DOI:10.1021/acs.orglett.7b01818
日期:2017.8.4
A three-step procedure for the enantioselective synthesis of spiro[indolizidine-1,3′-oxindoles], consisting of a stereoselective cyclocondensation reaction between (S)-tryptophanol and a prochiral or racemic δ-oxoester, bromination of the resulting oxazolopiperidone lactam, and a final stereoselective spirocyclization, is reported.
Enantioselective Formal Synthesis of (+)-Dihydrocorynantheine and (−)-Dihydrocorynantheol
作者:Mercedes Amat、Arantxa Gómez-Esqué、Carmen Escolano、Maria M. M. Santos、Elies Molins、Joan Bosch
DOI:10.1021/jo802387c
日期:2009.2.6
involving oxidation to an aldehyde, dehydration of the corresponding oxime, and reductive decyanation of the resulting α-aminonitrile, has been developed. The preparation of indoloquinolizidine 27 represents a formal total synthesis of (+)-dihydrocorynantheine, (−)-dihydrocorynantheol, and other indolo[2,3-a]quinolizidine and oxindole alkaloids bearing the same substitution pattern.
据报道,存在于众多吲哚生物碱中的3-乙基吲哚并[2,3- a ]喹唑烷部分的对映选择性结构,关键步骤是(S)-色氨酸与适当的外消旋δ-氧酸酯和区域-和-区域的立体选择性环缩合。内酰胺羰基上的恶唑并哌啶酮的立体选择性环化。已经开发出一种新的除去羟甲基辅助基团的方法,该方法包括氧化成醛,相应的肟脱水以及所得的α-氨基腈还原性脱氰。吲哚并喹唑啉27的制备代表了(+)-二氢红ry烷,(-)-二氢红ry酚和其他吲哚[2,3- a]的正式全合成。] quinolizidine和oxindole生物碱具有相同的取代方式。
Stereocontrolled Generation of Benzo[a]- and Indolo[2,3-a]quinolizidines from (S)-Tryptophanol and (S)-(3,4-Dimethoxyphenyl)alaninol-Derived Lactams
作者:Maria Pérez、Federica Arioli、Gianna Rigacci、Maria M. M. Santos、Arantxa Gómez-Esqué、Carmen Escolano、Pedro Florindo、Carlos Ramos、Joan Bosch、Mercedes Amat
DOI:10.1002/ejoc.201100294
日期:2011.7
Financial support from the Spanish Ministerio de Ciencia e Innovacion (MICINN) (project CTQ2009-07021/BQU), from the Portuguese Fundacao para a Ciencia e a Tecnologia (FCT) (project PTDC/QUI-QUI/111664/2009), and from the Spanish-Portuguese Integrated Action (AIB2010PT-00324 and E-07/11) is gratefully acknowledged. Thanks are also due to the AGAUR (Generalitat de Catalunya) for grant 2009-SGR-1111
来自西班牙国家科学与创新部长 (MICINN)(项目 CTQ2009-07021/BQU)、葡萄牙 Fundacao para a Ciencia ea Tecnologia (FCT)(项目 PTDC/QUI-QUI/111664/2009)以及来自非常感谢西班牙-葡萄牙综合行动(AIB2010PT-00324 和 E-07/11)。还要感谢 AGAUR (Generalitat de Catalunya) 授予 2009-SGR-1111 的资助,MICINN 授予 CR 的奖学金,以及 Leonardo da Vinci 计划(Unipharma 毕业生 5)授予 GR 的流动性资助
Enantioselective Spirocyclizations from Tryptophanol-Derived Oxazolopiperidone Lactams
作者:Mercedes Amat、Maria M. M. Santos、Antonia M. Gómez、Danica Jokic、Elies Molins、Joan Bosch
DOI:10.1021/ol0712327
日期:2007.7.1
A straightforward synthetic route to enantiopure spiro[indole-3,3'-indolizidines] is reported. The key step is a Lewis acid promoted cyclization of a N-a-tosyltryptophanol-derived oxazolopiperidone lactam in the presence of Et3SiH.
Straightforward Methodology for the Enantioselective Synthesis of Benzo[<i>a</i>]- and Indolo[2,3-<i>a</i>]quinolizidines
作者:Mercedes Amat、Maria M. M. Santos、Oriol Bassas、Núria Llor、Carmen Escolano、Arantxa Gómez-Esqué、Elies Molins、Steven M. Allin、Vickie McKee、Joan Bosch
DOI:10.1021/jo070539g
日期:2007.7.1
substituted benzo[a]- and indolo[2,3-a]quinolizidines has been developed. It consists of (i) a stereoselective cyclocondensation of a racemic or prochiral δ-oxo(di)ester with either (S)-(3,4-dimethoxyphenyl)alaninol or (S)-tryptophanol in a process involving a dynamic kinetic resolution and/or the differentiation of enantiotopic or diastereotopic ester groups, and (ii) a subsequent stereocontrolled cyclization
已开发出对苯并[ a ]-和吲哚并[2,3- a ]喹啉联苯胺的对映选择性两步法。它由(i)外消旋或前手性δ-氧代(二)酯与(S)-(3,4-二甲氧基苯基)丙氨醇或(S)-色氨酸的立体选择性环缩合反应涉及动态动力学拆分和/或对映体或非对映体酯基的区分,和(ii)随后利用所得恶唑并哌啶酮内酰胺中存在的被掩蔽的N-酰基亚氨基亚胺离子在芳环上进行立体控制环化。