127492-07-3Relevant academic research and scientific papers
Parallel synthesis of a vitamin D3 library in the solid-phase
Hijikuro,Doi,Takahashi
, p. 3716 - 3722 (2007/10/03)
A highly efficient synthesis of the vitamin D3 system on solid support is described. Two synthetic strategies for the solid-phase synthesis of vitamin D3 were developed. One is for 11-hydroxy analogues, and the other is for most other synthetic analogues. In the latter strategy, the sulfonate-linked CD-ring 58 was initially immobilized on PS-DES resin to give solid-supported CD-ring 63 (Scheme 10). Similarly, solid-supported CD-ring 63 was prepared by attachment of the CD-ring 10 to the chlorosulfonate resin 64. The vitamin D3 system was synthesized by Horner-Wadsworth-Emmons reaction of the A-ring phosphine oxide to a solid-supported CD-ring, followed by simultaneous introduction of the side chain and cleavage from resin with a Cu1-catalyzed Grignard reagent. Parallel synthesis of the vitamin D3 analogues was accomplished by a split and pool methodology utilizing radio frequency encoded combinatorial chemistry, and a manual parallel synthesizer for side chain diversification and deprotection. Additionally, we demonstrated the synthesis of various A-rings in a similar protocol for efficient preparation of building blocks.
Synthesis of Retiferol RAD1 and RAD2, the Lead Representatives of a New Class of des-CD Analogs of Cholecalciferol
Kutner, A.,Zhao, H.,Fitak, H.,Wilson, S. R.
, p. 22 - 32 (2007/10/02)
The design and total convergent synthesis are described for the leading representatives of the new class of analogs of cholecalciferol with the CD-ring system replaced with a two-carbon aliphatic spacer.The leading representatives of C21 retiferols (RAD1
