... Tetrahedron. Volume 67, Issue 31, 5 August 2011, Pages 5635–5641. ... and 75.5 and 125.7 MHz, respectively, in CDCl 3 , DMSO-d 6 or D 2 O using tetramethylsilane (TMS) as internal standard (Bruker ACP 300 MHz and 500 MHz), whereas for 1 H-decoupled 31 P NMR (202.4 ...