101
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Sawazaki T, Shimizu Y, Oisaki K, Sohma Y, Kanai M. Convergent and Functional-Group-Tolerant Synthesis of B-Organo BODIPYs. Org Lett 2018; 20:7767-7770. [PMID: 30499675 DOI: 10.1021/acs.orglett.8b03138] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Boron-dipyrromethenes (BODIPYs) are one of the most important fluorescent materials. Despite their potential unique properties, however, B,B-fluoro-organo BODIPYs (BFR-BODIPYs) possessing an organo group (R) on the boron center have not been studied in detail, due in part to challenges related to their synthesis. In this paper, a convergent synthesis of BFR-BODIPYs operative under mild conditions is reported. Conversions of the thus-synthesized functionalized BFR-BODIPYs by cross-coupling, condensation, and SN2 reactions at the R group are also demonstrated.
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102
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Ni J, Oguro T, Sawazaki T, Sohma Y, Kanai M. Hydroxy Group Directed Catalytic Hydrosilylation of Amides. Org Lett 2018; 20:7371-7374. [PMID: 30418782 DOI: 10.1021/acs.orglett.8b03014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Chemo- and site-selective hydrosilylation of α- or β-hydroxy amides using organocatalyst B(C6F5)3 and commercially available hydrosilanes is described. This transformation is operative under mild conditions and tolerates a wide range of functional groups. The reaction was applied for selective reduction of a specific amide group of the therapeutically important cyclic peptide cyclosporin A, demonstrating the potential usefulness of this catalytic method in late-stage structural transformations of drug lead molecules.
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103
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Yamakawa T, Yoshigoe Y, Wang Z, Kanai M, Kuninobu Y. Preparation of Solid-state Luminescent Materials by Complexation between π-Conjugated Molecules and Activators. CHEM LETT 2018. [DOI: 10.1246/cl.180735] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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104
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Yamatsugu K, Kawashima SA, Kanai M. Leading approaches in synthetic epigenetics for novel therapeutic strategies. Curr Opin Chem Biol 2018; 46:10-17. [DOI: 10.1016/j.cbpa.2018.03.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/12/2018] [Accepted: 03/17/2018] [Indexed: 12/20/2022]
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105
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Sakai D, Kanai M, Kobayashi S, Eguchi H, Baba H, Seo S, Taketomi A, Takayama T, Yamaue H, Ishioka C, Sho M, Takeyama Y, Fujimoto J, Toyoda M, Shimizu J, Goto T, Yoshimura K, Hatano E, Nagano H, Ioka T. Randomized phase III study of gemcitabine, cisplatin plus S-1 (GCS) versus gemcitabine, cisplatin (GC) for advanced biliary tract cancer (KHBO1401-MITSUBA). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy282] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
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106
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Ogawa Y, Naganuma A, Inagawa M, Iida T, Kimura M, Kumakura A, Yoshida T, Yamai N, Moroboshi A, Ueda R, Kawahara Y, Itou N, Shiozawa Y, Koyama Y, Funakoshi H, Manome M, Noguchi K, Kanai M, Ishiguro K, Ogawa T, Ishihara H. Effect of video endoscopic examination of swallowing function early after admission on length of hospital stay for patients with acute cerebral infarction: A retrospective study. Clin Nutr 2018. [DOI: 10.1016/j.clnu.2018.06.1150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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107
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108
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Yamatsugu K, Furuta M, Xi S, Amamoto Y, Liu J, Kawashima SA, Kanai M. Kinetic analyses and structure-activity relationship studies of synthetic lysine acetylation catalysts. Bioorg Med Chem 2018; 26:5359-5367. [PMID: 30006145 DOI: 10.1016/j.bmc.2018.07.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 06/20/2018] [Accepted: 07/06/2018] [Indexed: 12/21/2022]
Abstract
Lysine acylation of proteins is a crucial chemical reaction, both as a post-translational modification and as a method for bioconjugation. We previously developed a chemical catalyst, DSH, which activates a chemically stable thioester including acyl-CoA, allowing the site-selective lysine acylation of histones under physiological conditions. However, a more active catalyst is required for efficient lysine acylation in more complex biological milieu, such as in living cells, but there are no rational guidelines for developing efficient lysine acylation catalysts for use under physiological conditions as opposed to in organic solvents. We, herein, conducted a kinetic analysis of the ability of DSH and several derivatives to mediate lysine acetylation to better understand the structural elements essential for high acetylation activity under physiological conditions. Interestingly, the obtained trend in reactivity was different from that observed in organic solvents, suggesting that a different principle is necessary for designing chemical catalysts specifically for use under physiological conditions compared to catalysts for use in organic solvents. Based on the obtained information, we identified a new catalyst scaffold with high activity and structural flexibility for further modification to improve this catalyst system.
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109
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Itoh T, Kanzaki Y, Shimizu Y, Kanai M. Copper(I)‐Catalyzed Enantio‐ and Diastereodivergent Borylative Coupling of Styrenes and Imines. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804117] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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110
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Itoh T, Kanzaki Y, Shimizu Y, Kanai M. Copper(I)‐Catalyzed Enantio‐ and Diastereodivergent Borylative Coupling of Styrenes and Imines. Angew Chem Int Ed Engl 2018; 57:8265-8269. [DOI: 10.1002/anie.201804117] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Indexed: 12/14/2022]
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111
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Wakaki T, Sakai K, Enomoto T, Kondo M, Masaoka S, Oisaki K, Kanai M. Cover Feature: C(sp 3
)−H Cyanation Promoted by Visible-Light Photoredox/Phosphate Hybrid Catalysis (Chem. Eur. J. 32/2018). Chemistry 2018. [DOI: 10.1002/chem.201802171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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112
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Ioka T, Sakai D, Wada H, Eguchi H, Yanagihara K, Satake H, Shimizu J, Kanai M, Hashimoto K, Ajiki T, Nakamura M, Takeda Y, Yoshimura K, Hatano E, Nagano H. The feasibility study of short hydration with oral rehydration therapy in chemotherapy with cisplatin plus gemcitabine for biliary tract cancer (KHBO-1302). Ann Oncol 2018. [DOI: 10.1093/annonc/mdy151.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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113
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Wakaki T, Sakai K, Enomoto T, Kondo M, Masaoka S, Oisaki K, Kanai M. C(sp3
)−H Cyanation Promoted by Visible-Light Photoredox/Phosphate Hybrid Catalysis. Chemistry 2018; 24:8051-8055. [DOI: 10.1002/chem.201801746] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2018] [Indexed: 01/02/2023]
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114
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Oisaki K, Kanai M, Manick AD, Tanaka H. Organophotoredox/Copper Hybrid Catalysis for Regioselective Allylic Aminodecarboxylation of β,γ-Unsaturated Carboxylic Acids. SYNTHESIS-STUTTGART 2018. [DOI: 10.1055/s-0036-1591983] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
A new cooperative organophotoredox/copper catalysis allowing for the conversion of β,γ-unsaturated carboxylic acids into allylic hydrazides via radical regioselective allylic decarboxylative amination is reported. The coexistence of the copper catalyst is essential for the high yield and regioselectivity.
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115
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Fujita T, Yamamoto T, Morita Y, Chen H, Shimizu Y, Kanai M. Chemo- and Enantioselective Pd/B Hybrid Catalysis for the Construction of Acyclic Quaternary Carbons: Migratory Allylation of O-Allyl Esters to α-C-Allyl Carboxylic Acids. J Am Chem Soc 2018; 140:5899-5903. [DOI: 10.1021/jacs.8b02783] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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116
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Ni J, Taniguchi A, Ozawa S, Hori Y, Kuninobu Y, Saito T, Saido TC, Tomita T, Sohma Y, Kanai M. Near-Infrared Photoactivatable Oxygenation Catalysts of Amyloid Peptide. Chem 2018. [DOI: 10.1016/j.chempr.2018.02.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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117
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Fuse H, Kojima M, Mitsunuma H, Kanai M. Acceptorless Dehydrogenation of Hydrocarbons by Noble-Metal-Free Hybrid Catalyst System. Org Lett 2018; 20:2042-2045. [DOI: 10.1021/acs.orglett.8b00583] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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118
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Shirai T, Kanai M, Kuninobu Y. 2-Position-Selective C–H Perfluoroalkylation of Quinoline Derivatives. Org Lett 2018. [DOI: 10.1021/acs.orglett.8b00339] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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119
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Wakaki T, Togo T, Yoshidome D, Kuninobu Y, Kanai M. Palladium-Catalyzed Synthesis of Diaryl Ketones from Aldehydes and (Hetero)Aryl Halides via C–H Bond Activation. ACS Catal 2018. [DOI: 10.1021/acscatal.8b00440] [Citation(s) in RCA: 50] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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120
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Ni J, Sohma Y, Kanai M. Scandium(iii) triflate-promoted serine/threonine-selective peptide bond cleavage. Chem Commun (Camb) 2018; 53:3311-3314. [PMID: 28144647 DOI: 10.1039/c6cc10300f] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The site-selective cleavage of peptide bonds is an important chemical modification that is useful not only for the structural determination of peptides, but also as an artificial modulator of peptide/protein function and properties. Here we report site-selective hydrolysis of peptide bonds at the Ser and Thr positions with a high conversion yield. This chemical cleavage relies on Sc(iii)-promoted N,O-acyl rearrangement and subsequent hydrolysis. The method is applicable to a broad scope of polypeptides with various functional groups, including a post-translationally modified peptide that is unsuitable for enzymatic hydrolysis. The system was further extended to site-selective cleavage of a native protein, Aβ1-42, which is closely related to the onset of Alzheimer's disease.
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121
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Tajiri H, Uruno T, Shirai T, Takaya D, Matsunaga S, Setoyama D, Watanabe M, Kukimoto-Niino M, Oisaki K, Ushijima M, Sanematsu F, Honma T, Terada T, Oki E, Shirasawa S, Maehara Y, Kang D, Côté JF, Yokoyama S, Kanai M, Fukui Y. Targeting Ras-Driven Cancer Cell Survival and Invasion through Selective Inhibition of DOCK1. Cell Rep 2018; 19:969-980. [PMID: 28467910 DOI: 10.1016/j.celrep.2017.04.016] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2016] [Revised: 02/02/2017] [Accepted: 04/05/2017] [Indexed: 12/14/2022] Open
Abstract
Oncogenic Ras plays a key role in cancer initiation but also contributes to malignant phenotypes by stimulating nutrient uptake and promoting invasive migration. Because these latter cellular responses require Rac-mediated remodeling of the actin cytoskeleton, we hypothesized that molecules involved in Rac activation may be valuable targets for cancer therapy. We report that genetic inactivation of the Rac-specific guanine nucleotide exchange factor DOCK1 ablates both macropinocytosis-dependent nutrient uptake and cellular invasion in Ras-transformed cells. By screening chemical libraries, we have identified 1-(2-(3'-(trifluoromethyl)-[1,1'-biphenyl]-4-yl)-2-oxoethyl)-5-pyrrolidinylsulfonyl-2(1H)-pyridone (TBOPP) as a selective inhibitor of DOCK1. TBOPP dampened DOCK1-mediated invasion, macropinocytosis, and survival under the condition of glutamine deprivation without impairing the biological functions of the closely related DOCK2 and DOCK5 proteins. Furthermore, TBOPP treatment suppressed cancer metastasis and growth in vivo in mice. Our results demonstrate that selective pharmacological inhibition of DOCK1 could be a therapeutic approach to target cancer cell survival and invasion.
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122
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Tanabe K, Liu J, Kato D, Kurumizaka H, Yamatsugu K, Kanai M, Kawashima SA. LC-MS/MS-based quantitative study of the acyl group- and site-selectivity of human sirtuins to acylated nucleosomes. Sci Rep 2018; 8:2656. [PMID: 29422688 PMCID: PMC5805777 DOI: 10.1038/s41598-018-21060-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Accepted: 01/18/2018] [Indexed: 12/21/2022] Open
Abstract
Chromatin structure and gene expression are dynamically regulated by posttranslational modifications of histones. Recent advance in mass spectrometry has identified novel types of lysine acylations, such as butyrylation and malonylation, whose functions and regulations are likely different from those of acetylation. Sirtuins, nicotinamide adenine dinucleotide (NAD+)-dependent histone deacetylases, catalyze various deacylations. However, it is poorly understood how distinct sirtuins regulate the histone acylation states of nucleosomes that have many lysine residues. Here, we provide mass spectrometry-based quantitative information about the acyl group- and site-selectivity of all human sirtuins on acylated nucleosomes. The acyl group- and site-selectivity of each sirtuin is unique to its subtype. Sirt5 exclusively removes negatively-charged acyl groups, while Sirt1/2/3/6/7 preferentially remove hydrophobic acyl groups; Sirt1 and Sirt3 selectively remove acetyl group more than butyryl group, whereas Sirt2 and Sirt6 showed the opposite selectivity. Investigating site-selectivity for active sirtuins revealed acylated lysines on H4 tails to be poor substrates and acylated H3K18 to be a good substrate. Furthermore, we found Sirt7 to be a robust deacylase of H3K36/37, and its activity reliant on nucleosome-binding at its C-terminal basic region. All together, our quantitative dataset provides a useful resource in understanding chromatin regulations by histone acylations.
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123
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Tomino T, Tajiri H, Tatsuguchi T, Shirai T, Oisaki K, Matsunaga S, Sanematsu F, Sakata D, Yoshizumi T, Maehara Y, Kanai M, Cote JF, Fukui Y, Uruno T. DOCK1 inhibition suppresses cancer cell invasion and macropinocytosis induced by self-activating Rac1P29S mutation. Biochem Biophys Res Commun 2018; 497:298-304. [DOI: 10.1016/j.bbrc.2018.02.073] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 02/07/2018] [Indexed: 12/20/2022]
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124
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Ni J, Ozawa J, Oisaki K, Kanai M. Directing activator-assisted regio- and oxidation state-selective aerobic oxidation of secondary C(sp(3))-H bonds in aliphatic alcohols. Org Biomol Chem 2018; 14:4378-81. [PMID: 27109464 DOI: 10.1039/c6ob00678g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The regioselective conversion of an unactivated C(sp(3))-H bond of a methylene carbon (CH2) into a C-O single bond is an attractive reaction in organic synthesis. Herein, we present a strategy for a regio- and oxidation state-selective aerobic C-H oxidation based on an N-hydroxyamide-derived directing activator (DA), which is attached to a hydroxy group in alcohol substrates. The DA reacts with NOx species generated in situ from NaNO2, a Brønsted acid, and aerobic oxygen, and effectively generates an amidoxyl radical from the N-hydroxy moiety of the DA. Then, the amidoxyl radical promotes site-selective intramolecular C-H abstraction from methylenes with γ- (or δ-) selectivity. The thus-generated methylene radicals are trapped by molecular oxygen and NO. This process results in the predominant formation of nitrate esters as products, which suppresses undesired overoxidation. The products can be easily converted into alcohols after hydrogenolysis.
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125
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Ishizawa K, Nagai H, Shimizu Y, Kanai M. Boron-Catalyzed Carboxylic Acid-Selective Aldol Reaction with Trifluoromethyl Ketones. Chem Pharm Bull (Tokyo) 2018; 66:231-234. [DOI: 10.1248/cpb.c17-00545] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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