The reaction of pyrrolomethane 1 with 3- (phenylthio)propanal 3 in the presence of ytterbium (III) trifluoromethan- esulfonate hydrate in catalytic amount gave the 5-(2- thiophenyl ethane)-1,9-dimethyldipyrromethane 4, which was treated with DDQ and boron trifluoride etherate in the presence of triethylamine
yielded 8-(2- thiophenylethan) 4,4-difluoro-3,5dimethyl-4-bora-3a,4a-diaza-3-indacene 5.
Tertiary amines, in particular triethylamine
, are also used (16), (19-22), (41) being it the selected catalyst throughout this work.
1] Nonstandard abbreviations: Flt3 and FLT3, fms-related tyrosine kinase 3 gene and protein, respectively; AML, acute myeloid leukemia; ITD, internal tandem duplication; JM, juxtamembrane; D-HPLC, denaturing HPLC; PCR-RED-AGE, PCR-restriction enzyme digestion-agarose gel electrophoresis; TEAA, triethylamine
acetate; and TKD, tyrosine kinase domain.
These reactions may be catalyzed with pyridine or triethylamine
, which add even more nitrogen to the mold.
4-Dimethylaminopyridine (DMAP), triethylamine
(TEA), 4,4'-diaminodiphenyl sulfone (DDS), and anhydrous ethylether were purchased from Sinopharm Chemical Reagent Beijing Co.
Janis Robins, it involved a new, highly reactive phenolic resin and polymeric methylene diphenol isocyanate (MDI) coated on the sand and gassed with triethylamine
Phenol, 1-naphthol, and 4-phenylphenol (SRL, India), chloroform, methanol, tetrahydrofuran (THE), dimethylformamide, diethyl ether, acetone, benzene, toluene, triethylamine
, phosphor usoxychloride (SD Fine, India) were purified and dried by the usual procedure before use (37, 38).
0 (final concentration, 20 mmol/L), containing 100 mmol/L triethylamine
In some cases, spent foundry sand is classified as a hazardous waste due to the excess quantities of cadmium, chromium, lead, mercury and arsenic, or volatile organic compounds such as phenol, diphenyl, diphenylmethane, diisocyanate, triethylamine
Other analytical grade reagents like hydrochloric acid, triethylamine
, and absolute alcohol were supplied by Cinetica (Brazil).
was purchased from Pierce Chemical Co, and 4-fluoro-7-sulfamoyl-benzofurazan (ABD-F) was purchased from Dojindo Laboratories.
Generally, methyldiethanolamine, triethylamine
, or ethyl 4-(dimethylamino) benzoate are used as coinitiators for type II photoinitiators (Scheme 1).