Yoshimura, Y., Yamazaki, Y., Saito, Y., & Takahata, H. (2009). Synthesis of 1-(5,6-dihydro-2 H-thiopyran-2-yl)uracil by a Pummerer-type thioglycosylation reaction: The regioselectivity of allylic substitution. Tetrahedron, 65(45), 9091-9102. https://doi.org/10.1016/j.tet.2009.09.046

Yoshimura, Yuichi, Yoshiko Yamazaki, Yukako Saito, and Hiroki Takahata. "Synthesis of 1-(5,6-dihydro-2 H-thiopyran-2-yl)uracil by a Pummerer-type Thioglycosylation Reaction: The Regioselectivity of Allylic Substitution." Tetrahedron 65, no. 45 (2009): 9091-9102. https://doi.org/10.1016/j.tet.2009.09.046.

Yoshimura, Yuichi, et al. "Synthesis of 1-(5,6-dihydro-2 H-thiopyran-2-yl)uracil by a Pummerer-type Thioglycosylation Reaction: The Regioselectivity of Allylic Substitution." Tetrahedron, vol. 65, no. 45, 2009, pp. 9091-9102, https://doi.org/10.1016/j.tet.2009.09.046.