Science - USA (2021-11-05)
found that quenching the reduction of PhCO 2 H with methyl iodide gave the corresponding alkylated product 11 in 59% yield. The ...
and 22 in 85, 69, 63, and 75% yields, respec- tively (Fig. 3B). The Baran group demonstra- ted the industrial application of the ...
We then investigated the kinetics for both nBuOPh and PhCO 2 H reduction under vari- ous conditions (fig. S3, D to K). First, we ...
that protonation may occur intramolecularly through LiN-6. The slight preference between related substrates with different steri ...
AEROSOL CHEMISTRY A surface-promoted redox reaction occurs spontaneously on solvating inorganic aerosol surfaces Xiangrui Kong^1 ...
favored ( 17 ). Thus, biological catalysts (e.g., bacteria) are often used to facilitate SRAO reactions in industrial applicatio ...
salt–vapor interface. During efflorescence, no Srformation was observed with decreas- ing RH (fig. S5; from RH = 78 to 8%), whic ...
S:N ratios. The Stot:Ntotratio in Fig. 4C lies between the reference dashed and dotted lines for (NH 4 ) 2 SO 4 and NH 4 HSO 4 ...
S^0. For example, such a complicated surface environment may explain why ammonium sulfate acts as an efficient ice-nucleating pa ...
requires biocatalysts to overcome the energy barrier in the aqueous environment, whereas the mechanism reported here was spontan ...
enantioselective 1,2-boronate rearrangements using an unexpected catalyst, and its appli- cation to the synthesis of molecules f ...
that provide access to a variety of boronic ester products ( 15 – 19 ). A distinct approach that does not proceed via a boronate ...
gram scale via kinetic resolution of excess racemic bromochloromethyl boronic acid pinacol ester by deprotonated thiourea 4 to e ...
the N-H of6aby LiHMDS with chelation of the lithium counterion by the exocyclic isothiourea nitrogen and the amide oxygen. In li ...
respectively. In this manner, readily available aliphatic boronic esters could be converted through a three-step sequence into a ...
AIR POLLUTION Abating ammonia is more cost-effective than nitrogen oxides for mitigating PM2.5air pollution Baojing Gu1,2, Lin Z ...
America, western Europe, and Oceania (fig. S6). In these areas, populations are generally exposed to lower levels of PM2.5pollut ...
abatement costs. We estimated the global average cost of reducing NH 3 emission at 1.5 USD/kg NH 3 -N (weighted mean of mea- sur ...
by fertilizer or biological nitrogen fixation) and reduce wasteful nitrogen losses to avoid soil degradation ( 26 ). The main op ...
29/Z/ST10/02986 (NCN, Poland), 71961137011 (NSFC, China), and 870234 (FFG, Austria). D.C. acknowledges support received from the ...
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