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Then, we prepared the chalcone precursors (3a-e) by the application of Claisen Schmidt condensation on selected acetophenones (1a-c) and benzaldehydes (2a-d) according to literature methods (Scheme 1) [5, 11, 12].
The presence of azide group was further confirmed by Staudinger-Ninhydrin assay (ESI, † Methods, Scheme S3, Fig. S6C).
Chromans displaying aliphatic, aryl, vinyl, or silicon substituents at their benzylic sites (4-position) could be prepared by three separate methods (Scheme 5I III).
GO-N3 was then prepared using NaN3 and 1,2-epoxide ring opening reaction as described in ESI, † Methods (Scheme S2).
In an attempt to exchange the triethylamine moiety for other ligands, we found that the former could be substituted by pyridine by two methods (Scheme 3): reacting [Au(NHC OH] either with diluted pyridine hydrofluoride (Py ⋅HF; method A) or NEt3 ⋅3 HF in the presence of 1 equivalent of pyridine (method B) readily afforded the desired [[Au(NHC)(Py)](HF2)] complexes 4 a, b.
Similar(55)
The onset of instability in terms of the critical value of the nondimensional aerodynamic pressure for the sandwich beam is calculated using the p-method scheme.
Fig. 1 The genome walking method scheme.
Figure 6 Discriminative weight training method scheme.
Fig. 1 Zero mass withdrawal method scheme.
The structure of 6 was proved chemically via an alternative method (Scheme 1).
Figure 6 Comparison of achievable accuracy RMSE between exhaustive cooperation (Scheme 1) and the proposed method (Scheme 4). Figure 7 Comparison of traffic overhead between exhaustive cooperation (Scheme 1) and the proposed method (Scheme 4).
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