The first one occurs between 298 and 377 K and corresponds to the weight loss of two moles of water that is in the crystalline lattice and 0.5 mol of triethylamine
A mixture of 4-chloro-3-nitro- 2H- 1 benzopyran-2-one 2 (0.221 g, 1 mmol) and 2-amino 4-methoxy-benzothiazole 3c (0.180 g, 1 mmol), containing triethylamine
(three drops) in acetonitrile (5 mL) was refluxed on a water bath.
To a magnetically stirred solution compound 2 (100 mg, 0.00018 mol) in dry DCM (5 ml) maintained 0[degrees]C after it added Z-2-methyl but-2-enoyl chloride (0.00018 mol) and triethylamine
(0.00027 mol) at 0[degrees]C for 1 h.
Temperature of the reaction mass was reduced to 15[degrees]C and charged with triethylamine
(1.28 g, 2 mmol) and (0.5% w/w) DMAP.
([L.sub.2]) (0.25 g, 0.38 mmol) and Ru[C1.sub.2][(DMSO).sub.4] (0.09 g, 0.19 mmol), 2-methyl-2-butenoic acid (0.04, 0.38 mmol), triethylamine
(1.0 mL), and KOH (0.05 g, 0.76 mmol).
For the analysis of GAS and HBA, the mobile phase comprised a gradient system of methanol (solution A) and water containing 0.01 M triethylamine
(pH 8.0, solution B) at a flow rate of 1 mL/min as follows: a linear gradient of the mixture of solutions (A: B) from 10 : 90 (v/v) to 30: 70 (v/v) for 20 min.
To a vigorously stirred solution of the appropriate organic azide (0.5 mmol, 1 eq.) and alkyne (0.75 mmol, 1.5 eq.) in 4 mL THF is added copper (I) iodide (0.025 mmol, 0.05 eq.) followed by triethylamine
(0.6 mmol, 1.2 eq.).
To a solution of ethyl lactate (1g, 8.47 mmol) and triethylamine
(1.77 mL, 12.71 mmol) in 15 mL of dry pyridine was added portionwise MsCl (0.7723 mL, 9.32 mmol) at 0[degrees]C.
n-Butylamine (BuN[H.sub.2]), thionyl chloride (SO[Cl.sub.2]) and dimethylformamide (DMF) were supplied by Sigma Aldrich and triethylamine
The starting materials such as 7-methoxy-2,3-dihydro-[sup.1]H-inden-1-one (6), N-bromosuccinimide (NBS), 2,2,-azobisisobutyronitrile (AIBN), triethylamine
, [alpha], [alpha], [alpha]' [alpha]',-tetrabromo-o-xylene, sodium iodide, boron tribromide, tert-butyl chloride, and aluminum trichloride were purchased from Merck, ACROS, and Sigma-Aldrich.
have prepared naphthoquinone-amino acid conjugates starting from naphthoquinone and L-amino acids by a Michael type mechanism in aqueous ethanol solution at RT in the presence of triethylamine
Mikrokill COS (Lonza Personal Care) (Phenoxyethanol 0.75 (and) caprylyl glycol (and) chlorphenesin) Phase C TEA (Triethylamine