Visible-light-induced addition of carboxymethanide to styrene from monochloroacetic acid

• Kaj M. van Vliet,
• Nicole S. van Leeuwen,
• Albert M. Brouwer and
• Bas de Bruin

Beilstein J. Org. Chem. 2020, 16, 398–408, doi:10.3762/bjoc.16.38

• from monochloroacetic acid to obtain the product and propagates the reaction [45]. In situ IR experiments show an exponential grow for product formation, which is indeed indicative of a radical propagation mechanism (see Supporting Information File 1). In acetonitrile, a small amount of lactone was

Mechanochemical Friedel–Crafts acylations

• Mateja Đud,
• Anamarija Briš,
• Iva Jušinski,
• Davor Gracin and
• Davor Margetić

Beilstein J. Org. Chem. 2019, 15, 1313–1320, doi:10.3762/bjoc.15.130

• of in situ IR spectroscopy in solution [63]. Conclusion In conclusion, the experimental results demonstrate that Friedel–Crafts acylations could be effectively carried out under solid state ball-milling conditions. The reaction takes place by the initial complexation of the carbonyl group of the

Enantioselective Diels–Alder reaction of anthracene by chiral tritylium catalysis

• Qichao Zhang,
• Jian Lv and
• Sanzhong Luo

Beilstein J. Org. Chem. 2019, 15, 1304–1312, doi:10.3762/bjoc.15.129

• cation. Also, FeBr3, a chiral Fe(III) monophosphate (M = FeBr2) 1c or even the bulky Fe(III) bisphosphate 2a promoted the dissociation of trityl bromide. In the latter case, the dissociation was estimated to be 54% by in-situ IR spectroscopy (UV–vis spectra were not applicable due to absorption overlap

Opportunities and challenges for direct C–H functionalization of piperazines

• Zhishi Ye,
• Kristen E. Gettys and
• Mingji Dai

Beilstein J. Org. Chem. 2016, 12, 702–715, doi:10.3762/bjoc.12.70

• N-Boc-piperazine 10 using a combination of sec-BuLi and 28 to produce (S)-30 with an 89:11 er. In 2015, O’Brien and co-workers expanded this work and reported an elegant and detailed study of asymmetric lithiation trapping of N-Boc-piperazines [43]. With the help of in situ IR spectroscopy, they

IR and electrochemical synthesis and characterization of thin films of PEDOT grown on platinum single crystal electrodes in [EMMIM]Tf₂N ionic liquid

• Andrea P. Sandoval,
• Marco F. Suárez-Herrera and
• Juan M. Feliu

Beilstein J. Org. Chem. 2015, 11, 348–357, doi:10.3762/bjoc.11.40

• reaction of PEDOT were studied using in situ FTIR spectroscopy. Keywords: AFM; [EMMIM]Tf2N ionic liquid; in situ IR; PEDOT; Pt single crystals; Introduction Conducting polymers have been subject of an intense research during the last decades because they exhibit high conductivity and interesting optical

Anion effect controlling the selectivity in the zinc-catalysed copolymerisation of CO₂ and cyclohexene oxide

• Sait Elmas,
• Muhammad Afzal Subhani,
• Walter Leitner and
• Thomas E. Müller

Beilstein J. Org. Chem. 2015, 11, 42–49, doi:10.3762/bjoc.11.7

• . Copolymerisation of CO2 and cyclohexene oxide with binuclear [LZn2](X)2 complexes Complexes 1 and 2 were then evaluated as catalysts in the copolymerisation of CO2 and cyclohexene oxide CHO (Scheme 3). To obtain insight into the kinetics, the progress of the reactions was monitored with in situ IR spectroscopy and

• consumption of CO2 during the reaction. The polymer was obtained in excellent selectivity and only traces of cyclic cyclohexene carbonate (cCHC) were formed as byproduct ((o+p)/m <0.01). Analysis of the in-situ IR spectra recorded during the reaction revealed the evolution of an intensive band at 1080 cm−1

• . Köhler for scientific discussions and P. T. Kühn for synthesising the complexes. D. Engels and C. Minnich (S-PACT GmbH) are gratefully acknowledged for their contribution to in situ IR spectroscopy. M. Krautschick and V. Marker are thanked for experimental support.