1.7 to 4.2 K
5 Hydroxy 7 methoxy 2 (4 methoxyphenyl) 4H 1 benzopyran 4 one
... We have been investigating the compounds present in Kaempferia parviflora, a plant growing in the northeastern part of Thailand. Previously, we have reported the isolation and crystal structures of two flavonoids from ...
14
4 Methyl 7 [3 (4 o tolylpiperazin 1 yl)propoxy] 2H chromen 2 one
... in acetone (5 ml) and anhydrous ethanol (5 ml) for 48 h. The preci- pitate was filtered off and washed with fresh chloroform. The solvent was evaporated under reduced pressure from the combined filtrate and washings. The ...
8
(2′′S,5′′R,7′′S) 2 [2′ (2′′ Methyl 1′′,6′′ dioxaspiro[4 5]dec 7′′ yl)ethylsulfonyl] 1,3 benzothiazole
... To a solution of thioether (1) (461 mg, 1.32 mmol) in dichloro- methane (5 ml) at 273 K under an atmosphere of nitrogen was added sodium bicarbonate (554 mg, 6.59 mmol) and a solution of m- ...
7
3 Ethoxy 7 methoxycarbonyl 4 phenyltricyclo[4 2 1 02,5]non 3 ene
... Addition of endo-2-methoxycarbonyl-5-norbornene and ethyl 3- phenylpropiolate to Cp*RuCl(COD) (COD is 1,4-cyclooctadiene) in thf at 298 K yielded two regioisomers in a ratio of 2:1. Fractional ...
8
Ethyl 7 oxo 4 phenyltricyclo[4 2 1 02,5]non 3 ene 3 carboxylate
... Addition of 2-norbornenone and ethyl 3-phenylpropiolate to Cp*RuCl(COD) in THF at 298 K provided two regioisomers in a ratio of 7.5:1. Fractional recrystallization in an ethyl acetate/hexanes ...
6
4 Methyl 7 phenylsulfonamido 2H 1 benzopyran 2 one
... containing 7-amino-4-methylcoumarin ...278–283 K with stirring over a period of 30 ...(298–300 K) and then poured into ice–water (200 ...
8
5 Chloro 3 ethylsulfinyl 7 methyl 2 (4 methylphenyl) 1 benzofuran
... 3-Chloroperoxybenzoic acid (77%, 224 mg, 1.0 mmol) was added in small portions to the stirred solution of 5-chloro-3- ethylsulfanyl-7-methyl-2-(4-methylphenyl)-1-benzofuran (285 mg, 0.9 mmol) ...
8
Notes on the Power Sum $1^k+2^k+...+n^k$
... integers k ≥ 0, and n ≥ 1. The interested reader may refer to [1, 2, 4, 5, 7, 8, 12, 13, 14, 15, 16, 19, 22, 23, 24, 29, 31, 32, 33, 35, 38, 40, 42, 43, 44] for the history of ...
18
5 Bromo 2 (4 fluorophenyl) 7 methyl 3 phenylsulfinyl 1 benzofuran
... acetate, 2:1 v/v) to afford the title compound as a colorless solid [yield 56%, ...485–486 K; R f = 0.72 (hexane–ethyl acetate, 2:1 ...
9
4 Methyl 2 oxo 2,3 dihydro 1 benzopyran 7 yl benzenesulfonate
... To an anhydrous pyridine solution (10 ml) of 7-hydroxy-4-methyl-coumarin (1.76 g, 10 mmol), a solution of phenyl- sulfonyl chloride (11 mmol) was slowly added at 278–283 K with stirring for 30 min. ...
8
5 Bromo 3 ethylsulfinyl 7 methyl 2 (4 methylphenyl) 1 benzofuran
... acetate, 1:1 v / v ) to afford the title compound as a colorless solid [yield 71%, ...419–420 K; R f = 0.51 (hexane-ethyl acetate, 1:1 v / v ...
8
7 Bromo 2 (4 methylphenyl) 1 (methylsulfinyl)naphtho[2,1 b]furan
... of 7-bromo-2-(4- methylphenyl)-1-(methylsulfanyl)naphtho[2,1-b]furan (306 mg, ...acetate, 2:1 v/v) to afford the title compound as a colorless solid [yield 61%, ...485-486 ...
8
5 Iodo 7 methyl 2 (4 methylphenyl) 3 methylsulfinyl 1 benzofuran
... acetate, 1:1 v/v) to afford the title compound as a colorless solid [yield 73%, ...483–484 K; R f = 0.48 (hexane–ethyl acetate, 1:1 ...
7
Ethyl 4 cyclohexyl 7 (dicyanomethylene)tricyclo[4 2 1 02,5]non 3 ene 3 carboxylate
... Addition of 2-dicyanomethylene-5-norbornene and ethyl 3-cyclo- hexylpropiolate to Cp*RuCl(COD) in THF at 298 K provided two regioisomers in a ratio of 15:1. Fractional recystallization from an ethyl ...
11
5 Amino 4 (4 dimethylaminophenyl) 2 (4 methoxyphenyl) 7 (pyrrolidin 1 yl) 1,6 naphthyridine 8 carbonitrile
... form a dihedral angle of 2.9 (1)°. The mean planes passing through phenyl rings C and E make diheral angles of 12.7 (1) and 87.0 (2)°, respectively, with ring B. The best plane through the ...
13
2 (1 Adamantyl) 4 bromoanisole at 123 K
... The molecule of adamantane has high symmetry, Td, and adamantane crystallizes in the highest space group, Fm3 m (Nordman & Schmitkons, 1965; Amoureux et al., 1980; Amoureux & Bee, 1980). In view of the ...
7
Crystal structure of 2′ [(2′,4′ difluorobiphenyl 4 yl)carbonyl] 1′ phenyl 1′,2′,5′,6′,7′,7a' hexahydrospiro[indole 3,3′ pyrrolizin] 2(1H) one
... molecules, forming C(8) chains propagating along [010]; see Fig. 4. C—H interactions also link the molecules into C(8) chains propagating along [010]; see Fig. 5. In addition, weak intramolecular – interactions, ...
12
A novel logistic-NARX model as a classifier for dynamic binary classification
... case). All models are compared using the testing set and the OSA accuracy. The results are shown in Table 4. It can be seen that our new method has the best accuracy performance together with the regression-like ...
17
7 Acetoxy 4 (1 chloroethyl)coumarin
... Cl1 0.0396 (4) 0.0272 (4) 0.0482 (4) 0.0074 (3) 0.0032 (3) 0.0050 (3) O1 0.0395 (9) 0.0274 (9) 0.0290 (10) 0.0105 (8) 0.0046 (7) 0.0050 (7) O2 0.0588 (12) 0.0343 (11) 0.0387 (10) 0.0221 ...
7
Ethyl 1' [1 (4 methoxyphenyl) 3 phenoxy 4 phenylazetidin 1 yl] 1,3 dioxo 2′,3′,5′,6′,7′,7a′ hexahydroindan 2 spiro 3′ 1′H pyrrolizine 2′ carboxylate
... C27 0.0583 (14) 0.0573 (15) 0.0752 (16) −0.0134 (12) 0.0231 (12) −0.0146 (13) C28 0.0328 (9) 0.0461 (11) 0.0500 (11) 0.0008 (8) 0.0103 (8) 0.0046 (9) C29 0.0388 (11) 0.0800 (18) 0.0580 (13) 0.0066 (11) 0.0023 (10) ...
13