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Publikováno v:
Tetrahedron Letters. 53(9):1173-1176
The reaction of thiophene derivatives with Grignard reagent (EtMgCl) and a catalytic amount of amine (Cy 2 NH) induced the metalation at the α-position. Following addition of several aryl halides in the presence of a nickel or palladium catalyst aff
Publikováno v:
Tetrahedron Letters. 41(1):119-124
A convenient, efficient and stereoselective synthesis of a range of bis(alk-3-en-1-ynyl)benzenes with E- and Z-configuration is described. The protocol involves Cu-mediated cross-coupling reaction of (E)- and (Z)-alk-1-enyldisiamylboranes with (trime
Publikováno v:
Tetrahedron Letters. 47(43):7541-7544
2-Borylpyrrole was prepared from 2-iodopyrrole almost quantitatively and then reacted with dihaloarenes under typical reaction conditions of Suzuki–Miyaura cross coupling to give bis(pyrrol-2-yl)arenes in good yields, while the cross coupling react
Publikováno v:
Tetrahedron Letters. 50(27):3982-3984
In the presence of a Ni/phosphine ligand catalyst, dimethylzinc, alkyne, butadiene, aldehyde, and primary amine were successively combined via dimerization of butadiene to provide (3E,7E,10Z)-dodecatrienylamine in good yields with excellent regio and
Publikováno v:
Tetrahedron Letters. 50(26):3270-3272
Treatment of secondary or tertiary alkyl bromides with alkyl Grignard reagents in the presence of catalytic amounts of silver bromide and potassium fluoride in CH2Cl2 afforded the corresponding cross-coupling products in reasonable yields. Moreover,
Publikováno v:
Tetrahedron Letters. 38(19):3447-3450
The cross-coupling reaction of (RO)2BB(OR)2 (RO =methoxo and pinacolato) with aryl triflates to give arylboronates was carried out at 80 °C in the presence of PdCl2(dppf) (3 mol%), dppf (3 mol%) and KOAc (3 equivs) in dioxane. The reaction was avail
Publikováno v:
Tetrahedron Letters. 37(38):6889-6892
The cross-coupling reaction of bis(pinacolato)diboron [(Me 4 C 2 O 2 )BB(O 2 C 2 Me 4 )] with allyl acetates regio- and E-stereoselectively provided the pinacol esters of allylboronic acids in high yields. The reaction was efficiently catalyzed by Pd