One-Pot Multicomponent Synthesis of Diversely Substituted 2-Aminopyrroles. A Short General Synthesis of Rigidins A, B, C, and D
摘要:
Privileged medicinal scaffolds based on the structures of tetra- and pentasubstituted 2-aminopyrroles were prepared via one-pot multicomponent reactions of structurally diverse aldehydes and N-(aryl-, hetaryl-, alkylsulfonamido)acetophenones with activated methylene compounds. This methodology was used in a four-step synthesis of alkaloids rigidins A, B, C, and Din overall yields of 61%, 58%, 60%, and 53%, respectively. Of these, rigidins B, C, and D were synthesized for the first time.
Synthesis of α-Amino Ketones from Terminal Alkynes via Rhodium-Catalyzed Denitrogenative Hydration of N-Sulfonyl-1,2,3-triazoles
摘要:
N-Sulfonyl-1,2,3-triazoles react with water in the presence of a rhodium catalyst to produce alpha-amino ketones in high yield. An intermediary alpha-imino rhodium(II) carbenoid undergoes insertion into the O-H bond of water. This transformation formally achieves 1,2-aminohydroxylation of terminal alkynes in a regioselective fashion when combined with the copper(I)-catalyzed 1,3-dipolar cycloaddition with N-sulfonyl azides.
2-Methylquinoline promoted oxidative ring-opening of N-sulfonyl aziridines with DMSO: facile synthesis of α-amino aryl ketones
作者:Xianhui Zhang、Shuai-Shuai Li、Liang Wang、Lubin Xu、Jian Xiao、Zhen-Jiang Liu
DOI:10.1016/j.tet.2016.10.041
日期:2016.12
2-Methylquinoline promoted room-temperature oxidative ring-opening of N-sulfonyl aziridines with DMSO has been developed, providing a mild and convenient method for the synthesis of a variety of different N-sulfonyl protected α-amino aryl ketones. The employment of 2-methylquinoline was crucial for the success of this mild transformation and good to excellent yields could be achieved.
Novel three-component synthesis and antiproliferative properties of diversely functionalized pyrrolines
作者:Igor V. Magedov、Giovanni Luchetti、Nikolai M. Evdokimov、Madhuri Manpadi、Wim F.A. Steelant、Severine Van slambrouck、Paul Tongwa、Mikhail Yu. Antipin、Alexander Kornienko
DOI:10.1016/j.bmcl.2008.01.019
日期:2008.2
Diversely substituted 2-pyrrolines have been prepared by a novel multicomponent process involving a reaction of various N-(aryl- and alkylsulfonamido)-acetophenones with aldehydes and malononitrile. While the reaction is highly regioselective, it is not stereoselective, generating a mixture of cis and trans 2-pyrrolines. A number of analogs from both cis and trans 2-pyrroline libraries were found to have antiproliferative activity in human cancer cell lines. (c) 2008 Elsevier Ltd. All rights reserved.
Synthesis of α-Amino Ketones from Terminal Alkynes via Rhodium-Catalyzed Denitrogenative Hydration of <i>N</i>-Sulfonyl-1,2,3-triazoles
N-Sulfonyl-1,2,3-triazoles react with water in the presence of a rhodium catalyst to produce alpha-amino ketones in high yield. An intermediary alpha-imino rhodium(II) carbenoid undergoes insertion into the O-H bond of water. This transformation formally achieves 1,2-aminohydroxylation of terminal alkynes in a regioselective fashion when combined with the copper(I)-catalyzed 1,3-dipolar cycloaddition with N-sulfonyl azides.
One-Pot Multicomponent Synthesis of Diversely Substituted 2-Aminopyrroles. A Short General Synthesis of Rigidins A, B, C, and D
作者:Liliya V. Frolova、Nikolai M. Evdokimov、Kathryn Hayden、Indranil Malik、Snezna Rogelj、Alexander Kornienko、Igor V. Magedov
DOI:10.1021/ol103149b
日期:2011.3.4
Privileged medicinal scaffolds based on the structures of tetra- and pentasubstituted 2-aminopyrroles were prepared via one-pot multicomponent reactions of structurally diverse aldehydes and N-(aryl-, hetaryl-, alkylsulfonamido)acetophenones with activated methylene compounds. This methodology was used in a four-step synthesis of alkaloids rigidins A, B, C, and Din overall yields of 61%, 58%, 60%, and 53%, respectively. Of these, rigidins B, C, and D were synthesized for the first time.