WebTHF-78 to -35 °C, 70 min, 85% See the Davis Asymmetric Hydroxylation. Red-Al. PhMe -78 °C to RT, 12 h ... -78 °C to RT, 30 min, 95% See the Swern Oxidation. LiTMP. THF-23 to -10 °C, 30 min, 90% See the Chan Rearrangement. SmI2. THF. RT, 4 h, 92% ... Web6 Dec 2024 · Preparation of bioconjugates. Following activation, hapten coupling was carried out by dropwise adding a 50 mM solution of the active ester in N,N -dimethylformamide (or MeCN) to a 15 mg/mL BSA or ...
Tetrahydrofuran - Wikipedia
Web19 Oct 2024 · THF was cooled with an ice/CaCl 2 cooling mixture followed by the addition of 23.0 mL (64.4 mmol) of n-BuLi (2.8 M in cyclohexane). After 10 min of stirring 10.00 g (61.3 mmol) of 3-bromothiophene were added and the mixture was stirred for additional 30 min under cooling when 8.71 g (61.3 mmol) of iodomethane were added dropwise. Web19 Jan 2024 · Treatment of the azidoesters 4–7 with triphenylphosphine (1.5 eq.) in tetrahydrofuran (rt to 40 °C/16 h) gave the corresponding oxazolines 8–11 in 50–94% isolated yield. Thus, the reagents/conditions of the Staudinger/aza-Wittig reaction for conversions of azidoesters 4 – 7 to oxazolines 8 – 11 were found to be of general … hub5emu.sandai.net
Rapid total synthesis of petasin and isopetasin - ScienceDirect
Web14 Mar 2024 · Knowledge about electronic structures is important to gain an understanding of the unique functional properties of diradicaloids. In this study, we synthesized and characterized a diradicaloid in which two phenalenyl radical sites are coupled antiferromagnetically via a through-space interaction. The results of quantum chemical, … Web7 Feb 2024 · It is considered that solvent, whose δ-values is approximate to 22.5 MPa 1/2, shows good solubility for lignin. The δ value of water is 23.4 (cal/cm 3) 1/2, and the δ value of THF is 9.5 (cal/cm 3) 1/2. H 2 O/THF co-solvent is commonly considered as a good solvent for lignin ( Mlynar and Sarkanen, 1996; Hansen, 2007 ). Web25 Oct 2004 · A solution of compound 4447 (110 mg, 0.36 mmol) in dry THF (4 mL) was stirred at rt under argon. Bu 4 NF (1.8 mL, 1 M in THF) was added and the reaction mixture was refluxed for 5 h. After cooling, a solution of NH 4 Cl satd. (10 mL) was added and the aqueous phase was extracted with EtOAc (3×10 mL). ban muon hen ho tap 55