73674-62-1Relevant academic research and scientific papers
Selective Pd-catalyzed monoarylation of small primary alkyl amines through backbone-modification in ylide-functionalized phosphines (YPhos)
Rodstein, Ilja,Prendes, Daniel Sowa,Wickert, Leon,Paa?en, Maurice,Gessner, Viktoria H.
, p. 14674 - 14683 (2020/12/29)
Ylide-substituted phosphines have been shown to be excellent ligands for C-N coupling reactions under mild reaction conditions. Here we report studies on the impact of the steric demand of the substituent in the ylide-backbone on the catalytic activity. Two new YPhos ligands with bulky ortho-tolyl (pinkYPhos) and mesityl (mesYPhos) substituents were synthesized, which are slightly more sterically demanding than their phenyl analogue but considerably less flexible. This change in the ligand design leads to higher selectivities and yields in the arylation of small primary amines compared to previously reported YPhos ligands. Even MeNH2 and EtNH2 could be coupled at room temperature with a series of aryl chlorides in high yields.
HIGH-CAPACITY OPTICAL STORAGE MEDIA
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Page/Page column 45, (2010/10/20)
The invention accordingly relates to an optical recording medium comprising a substrate, a reflecting layer and a recording layer, wherein the recording layer comprises a compound of formula (I) or a mesomeric or tautomeric form thereof, wherein M1 is a metal cation in the oxidation state +3, a hydroxy or halogeno metal group wherein the metal is in the oxidation state +4, or an oxo metal group wherein the metal is in the oxidation state +5; (III) and (IV) are each independently of the other (V), (VI) or (VII); (VIII) is (IX), (X), (XI), (XII), (XIII) or (XIV); (XV) is (XVI) or C2-C8 heteroaryl unsubstituted or mono- or poly-substituted by R10, R11, R12 and/or R13; Q1 is N or CR18 , Q2 is N or CR19 , Q3, Q5 and Q7 are each independently of the other CR 20 R21,O, S or NR22 , Q4 is CR16 or N and Q6 is CR 17or N ; and R2and/or R 6 are O, S or NR 33. Please see the disclosure for the other substituents which are less relevant. The compounds of formula (I) are novel and also claimed, as well as the compound of formula (II), or a mesomer or tautomer thereof, wherein R38 is halogen, CF3, NO2, CN, COR22, COOR23 , SO3R23, NCO or SCN, G1, G 2, M1, R1, R2, R4, R5, R6, R8, R22 and R23are as defined in formula (I), M 2m+ is a cation with m positive charges, and m is an integer 1, 2 or 3. The optical recording media are remarkably suitable for DVD±R (658 nm), especially at high recording speeds.
Synthesis of novel thrombin inhibitors. Use of ring-closing metathesis reactions for synthesis of P2 cyclopentene- and cyclohexenedicarboxylic acid derivatives
Thorstensson, Fredrik,Kvarnstr?m, Ingemar,Musil, Djordje,Nilsson, Ingemar,Samuelsson, Bertil
, p. 1165 - 1179 (2007/10/03)
The thrombin inhibitory tripeptide D-Phe-Pro-Arg has been mimicked using either cyclopentenedicarboxylic derivatives or a cyclohexenedicarboxylic derivative as surrogate for the P2 proline. In the P3 position, tertiary amides were optimized as D-Phe P3 re
Chlorosulfination with Thionyl Chloride of Aromatic Methyl Ethers Containing Other Functional Groups
Bell, Kevin H.,McCaffery, Leslie F.
, p. 1213 - 1224 (2007/10/02)
Further studies on the direct chlorosulfination with thionyl chloride of aroamtic methyl ethers are described.In some cases (e.g. 1,6-dimethoxynaphthalene, 1,2,4-trimethoxybenzene, ethyl 3,5- and 3,7-dimethoxy-2-naphthoate, 3,5-dimethoxyphenyl benzoate) g
