title: Ethyl 6-methyl-4-[2-(4,4,5,5-tetra-methyl-1,3,2-dioxaborolan-2-yl)thio-phen-3-yl]-2-thioxo-1,2,3,4-tetra-hydro-pyrimidine-5-carboxyl-ate.
abstract: A new Biginelli compound, C(18)H(25)BN(2)O(4)S(2), containing a boronate ester group was synthesized from a lithium bromide-catalysed reaction. The compound crystallizes with two independent mol-ecules in the asymmetric unit that differ mainly in the conformation of the ester functionality. The crystal structure is stabilized by inter-molecular N-H⋯O and N-H⋯S hydrogen bonds involving the 3,4-dihydro-pyrimidine-2(1H)-thione NH groups as donors and the carbonyl O and thio-phene S atoms as acceptors.
authors.forename: Andreas
authors.initials: A
authors.lastname: Decken
authors.forename: Matthew T
authors.initials: MT
authors.lastname: Zamora
authors.forename: Dominique R
authors.initials: DR
authors.lastname: Duguay
authors.forename: Christopher M
authors.initials: CM
authors.lastname: Vogels
authors.forename: Stephen A
authors.initials: SA
authors.lastname: Westcott