The chiral tridentate spiro P‐N‐S ligands (SpiroSAP) were developed, and their iridium complexes were prepared. Introduction of a 1,3‐dithiane moiety into the ligand resulted in a highly efficient chiraliridium catalyst for asymmetrichydrogenation of β‐alkyl‐β‐ketoesters, producing chiralβ‐alkyl‐β‐hydroxyesters with excellent enantioselectivities (95–99.9 % ee) and turnover numbers of up to 355 000
[EN] PURINONES AS UBIQUITIN-SPECIFIC PROTEASE 1 INHIBITORS<br/>[FR] PURINONES UTILISÉS COMME INHIBITEURS DE LA PROTÉASE SPÉCIFIQUE DE L'UBIQUITINE 1
申请人:FORMA THERAPEUTICS INC
公开号:WO2017087837A1
公开(公告)日:2017-05-26
The application relates to inhibitors of USP1 useful in the treatment of cancers, and other USP1 associated diseases and disorders, having the Formula: (I), where R1, R2, R3, R3', R4, R5, X1, X2, X3, X4, and n are described herein.
Stereoselective Synthesis of Fused Vinylcyclopropanes by Intramolecular Tsuji–Trost Cascade Cyclization
作者:John Braun、Maxim I. Ariëns、Bianca T. Matsuo、Steven de Vries、Ellen D. H. van Wordragen、Brecht D. Ellenbroek、Christophe M. L. Vande Velde、Romano V. A. Orru、Eelco Ruijter
DOI:10.1021/acs.orglett.8b02232
日期:2018.11.2
pendant β-ketoamide or related carbon nucleophile to give γ-lactam-fused vinylcyclopropanes is reported. In addition to two new rings, the products contain three new C-C stereocenters (two of which are quaternary) with a 9:1 dr. Moreover, the reaction proceeds in >94% enantiospecificity with optically enriched starting materials, using an inexpensive carbohydrate as the source of chirality.
CeCl3-promoted one-pot synthesis of multisubstituted bispyrano[2,3-c]pyrazole derivatives
作者:Keyume Ablajan、Li-Ju Wang、Zulipiya Maimaiti、Yong-Ting Lu
DOI:10.1007/s00706-013-1104-6
日期:2014.3
AbstractA simple and efficient method was developed for the synthesis of multisubstituted bispyrano[2,3-c]pyrazole derivatives via one-pot reaction of β-keto esters, hydrazine (or phenylhydrazine), terephthalaldehyde, and malononitrile in the presence of CeCl3·7H2O (10 mol%) as a catalyst. This method provides the products in good yields after a simple workup procedure without further purification
摘要开发了一种简单有效的方法,在存在CeCl 3 ·的情况下,通过β-酮酸酯,肼(或苯肼),对苯甲醛和丙二腈的一锅反应,合成多取代的双吡喃并[2,3- c ]吡唑衍生物。 7H 2 O(10 mol%)作为催化剂。通过简单的后处理步骤,该方法无需进一步纯化即可提供高收率的产物。 图形概要