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Room-Temperature, Water-Promoted, Radical-Coupling Reactions of Phenols with tert-Butyl Nitrite

21.06.2017 | Wen-Ting Wei; Wen-Ming Zhu; Weida Liang; Yi Wu; Hui-Yan Huang; Yi-Ling Huang; Junfei Luo; Hongze Liang, Synlett, 2017

SynlettDOI: 10.1055/s-0036-1589038 A radical–radical cross-coupling reaction of phenols with tert-butyl nitrite has been developed with the use of water as an additive. This method allows the construction of C–N bonds under an air atmosphere at room temperature, providing the ortho-nitrated ...

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Direct ortho Arylation of Anisoles via the Formation of Four-Membered Lithiumcycles/Palladacycles

21.06.2017 | Xiaoyu Xiong; Ranran Zhu; Lin Huang; Shuqin Chang; Jianhui Huang, Synlett, 2017

SynlettDOI: 10.1055/s-0036-1588863 We report here our latest discovery on the directed lithiation and palladium-catalyzed arylation of anisoles. During this research, the formation of a four-membered lithiumcycle followed by transmetalation to the corresponding palladacycle has been achieved, ...

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Metal-free Oxidative Cross-Coupling Reaction of Aromatic Compounds Containing Heteroatoms

21.06.2017 | Koji Morimoto; Toshifumi Dohi; Yasuyuki Kita, Synlett, 2017

SynlettDOI: 10.1055/s-0036-1588455 The biaryl unit containing a heteroatom is a key structure in a large number of natural products and π-conjugated organic systems. The cross-couplings can provide powerful methods for the construction of biaryls and heterobiaryls; thus the development of a new ...

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Reactivity of Seven-Membered-Ring trans-Alkenes with Electrophiles

21.06.2017 | Jillian R. Sanzone; K. A. Woerpel, Synlett, 2017

SynlettDOI: 10.1055/s-0036-1588451 Seven-membered-ring trans-alkenes containing a silicon–oxygen bond reacted rapidly with oxygen gas and electron-deficient alkenes and alkynes to give products with high selectivity. Addition of an electron-donating substituent or incorporating additional strain ...

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Preparation of Peptide o-Aminoanilides Using a Modified Dawson's Linker for Microwave-Assisted Peptide Synthesis

21.06.2017 | Shugo Tsuda; Tsuyoshi Uemura; Masayoshi Mochizuki; Hideki Nishio; Taku Yoshiya, Synlett, 2017

SynlettDOI: 10.1055/s-0036-1588862 Based on the structure of Dawson’s 3,4-diaminobenzoic acid (Dbz) linker designed for Fmoc solid-phase peptide-thioester synthesis, the 4-amino-3-nitrobenzoic acid [Dbz(NO2)] linker was developed for microwave-assisted synthesis. The Dbz(NO2) linker can be ...

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A Highly Efficient Approach for the Synthesis of Novel Trifluoroacetylated Enaminones using DBU as a Base

21.06.2017 | P. Kumari; N. Sharma; A. Kumar; S. C. Mohapatra; S. Bhagat, Synlett, 2017

SynlettDOI: 10.1055/s-0036-1588865 An efficient methodology has been developed for the synthesis of a variety of novel trifluoroacetylated enaminones by using trifluoroacetic anhydride in DCE as solvent and DBU as a base via electrophilic trifluoroacetylation. X-ray crystallographic studies ...

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Milestones in Microwave Chemistry (SpringerBriefs in Molecular Science), Keglevich G

20.06.2017 | Keglevich, György; Kiss, Nóra Zsuzsa; Grün, Alajos; Bálint, Erika; Kovács, Tamara, Synthesis, 2017

The microwave (MW) technique has become an important tool also in the organophosphorus field of organic chemistry. On the one hand, otherwise reluctant reactions, such as the esterification of P-acids, may be enhanced by the effect of MW, while on the other hand, catalysts may be omitted, or ...

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Nitrile Oxides, Nitrones and Nitronates in Organic Synthesis: Novel Strategies in Synthesis

20.06.2017 | Vincent Perez; Antoine Fadel; Nicolas Rabasso, Synthesis, 2017

SynthesisDOI: 10.1055/s-0036-1589042 N-Sulfonyl ynamido-phosphonates were prepared from sulfonamides and bromo alkynylphosphonates through a direct copper-catalyzed coupling reaction. The substrates were obtained in good to excellent yields. The latter are valuable partners to react ...

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Synthesis of 2,6-Substituted 7-(Het)aryl-7-deazapurine Nucleobases (2,4-Disubstituted 5-(Het)aryl-pyrrolo[2,3-d]pyrimidines)

20.06.2017 | Nazarii Sabat; Sabina Smoleń; Petr Nauš; Pavla Perlíková; Magdaléna Cebová; Lenka Poštová Slavětínská; Michal Hocek, Synthesis, 2017

SynthesisDOI: 10.1055/s-0036-1588443 A series of 7-(het)aryl-7-deazapurine nucleobases (5-[(het)aryl]-2,4-disubstituted 7H-pyrrolo[2,3-d]pyrimidines) bearing NH2, OMe, SMe, or Me groups at position 6 and H, NH2, or Me at position 2 were prepared by the aqueous Suzuki–Miyaura cross-coupling ...

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Cluster Cover Page

20.06.2017 | Synlett, 2017

Synlett 2017; 28: 1268-1269DOI: 10.1055/s-0036-1590626 [...] © Georg Thieme Verlag KG Stuttgart · New York Artikel in Thieme eJournals:Inhaltsverzeichnis|Abstract

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