RETRACTED: Hang et al. Sensitivity Analysis Based on Markovian Integration by Parts Formula. Math. Comput. Appl. 2017, 22, 40

Abstract

We, the authors, have requested that the title paper [1] is retracted [...]

Recent Progress in Organocatalytic Asymmetric Domino Transformations

“…As an extensiono ft heir previous reports (Scheme 83), [128,129] Chen and co-workers developed a DABCO-catalyzedd omino Rauhut-Currier (vinylogous Morita-Baylis-Hillman)/Michael/Michael reaction of 2-arylideneindane-1,3-diones 308 and acrolein (10a)f or the highly diastereoselective synthesis of racemicb isspiro[indane-1,3-dione]cyclohexane frameworks 679. [263] An enantioselective variant of this reaction was achieved by performing ar epresentative reaction with hydroquinidine 680 as the catalyst, which yielded the desired product in ah ighd iastereoselectivity and amoderate ee value (Scheme 178). [263] Li andc o-workersa lso reported the synthesis of enantioenricheds piro-1,3-indandiones 681 by using a domino Michael/aldol reaction between 308 and g-nitroaldehydes 682 (Scheme 178).…”

“…[263] An enantioselective variant of this reaction was achieved by performing ar epresentative reaction with hydroquinidine 680 as the catalyst, which yielded the desired product in ah ighd iastereoselectivity and amoderate ee value (Scheme 178). [263] Li andc o-workersa lso reported the synthesis of enantioenricheds piro-1,3-indandiones 681 by using a domino Michael/aldol reaction between 308 and g-nitroaldehydes 682 (Scheme 178). [264] Theq uinidine-derived squaramide 634 was used as the catalyst, which producedt he desired products 681 in good yields, good to high ee values, ande xcellent diastereoselectivities.…”

Charge‐Functionalized and Structurally Enhanced (Cryo)Hybrids from Acrylic (Co)Monomers and Kaolin: Altering Physicochemical Properties via Cryotropic Gelation

“…It was also of note that all PDMAEMA-based gel samples; clay-free and hybrid Hgel and Cgel exhibited a sharp mass loss in the range of 250-450 C. All gel samples showed an initial decomposition temperature above 200 C due to the presence of long carbon chains as reported by Yang and coworkers. 42 In Figure 4(B), DTG curves indicated that the clay-free Hgel and Cgel exhibited the highest rate of decomposition. At 800 C, the residual weight percent of clay-free Hgel (without the addition of KLN) was 4.9%, while the residual weight percentage of PDA/KLN10-Hgel (with 2.40 w/v% KLN) was 14.5%.…”

Facile Synthesis of Platinum–Cerium(IV) Oxide Hybrids Arched on Reduced Graphene Oxide Catalyst in Reverse Micelles with High Activity and Durability for Hydrolysis of Ammonia Borane

“…Up to now,v arious transition-metal catalystsh aveb een tested fort he hydrolysis of AB, including noble metals( e.g.,P t, Rh, Ru,P d, and Ag) [18][19][20][21][22][23][24][25][26] and non-noblem etals (e.g.,F e, Co, Ni, and Cu). [27][28][29][30][31][32][33][34] Although Rh, Ru, and Pt metal nanoparticles (NPs) are costly and limitedi na bundance, they are superiort o non-noblem etal NPs because of their long lifetimes and high activities in the hydrolysis of AB even at very lowm etal concentrations.…”

“…So, the use of noblem etal NPs as catalysts for the hydrolysis of AB still has great significance. [19,20,[35][36][37][38][39] In general, the catalytic activity of metal NPs is closely relevantt ot heir sizes:as mall size typically corresponds to enhanced catalytic activity of the metal NPs. However,n anosized metal NPs often suffer from seriousa ggregation because of the increased surface energy of the particles, whicht hus leads to am omentous decreasei nt heir catalytic activity,l ifetime, and efficiency.…”