Belleau's Reagent
Title: Belleau's Reagent
CAS Registry Number: 88816-02-8
CAS Name: 2,4-Bis(4-phenoxyphenyl)-1,3,2,4-dithiadiphosphetane 2,4-disulfide
Molecular Formula: C24H18O2P2S4
Molecular Weight: 528.61
Percent Composition: C 54.53%, H 3.43%, O 6.05%, P 11.72%, S 24.26%
Literature References: p-Phenoxy derivative of Lawesson's reagent, q.v. Prepn: G. Lajoie et al., Tetrahedron Lett. 24, 3815 (1983). Synthetic applications: B. Yde et al., Tetrahedron 40, 2047 (1984); M. Caron, J. Org. Chem. 51, 4075 (1986); M. M. Campbell et al., Tetrahedron Lett. 30, 1997 (1989); A. G. M. Barrett, A. C. Lee, J. Org. Chem. 57, 2818 (1992); R. Shabana et al., Tetrahedron 49, 1271 (1993); eidem, ibid. 50, 6975 (1994); S. V. Ley et al., Org. Lett. 4, 711 (2002).
Properties: Yellow crystals from toluene, mp 187-190°. Sol in CHCl3, THF, toluene, acetonitrile.
Melting point: mp 187-190°
Use: Mild thionation reagent in organic synthesis.

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