## Abstract The preparation of the title compunds, using β‐ionone, is accomplished in fair overall radiochemical yield from (2‐^14^C) bromacetic acid, in 7 and 8 steps respectively. The sequence utilises ylid reactions of the phosphonoacetate derived from bromacetic ester, and is also capable of th
Synthesis of all trans [3′-14C]menaquinone-4
✍ Scribed by K. Shimada; K. Tadano; T. Satoh; K. Hashimoto; S. Tanaka; T. Yuzuriha
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- French
- Weight
- 201 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
A synthetic procedure for producing all trans [3A4C]menaquinone-4 is described The radiolabe is introduced using ethyl [3-'4C]acetoacetate as shown in the scheme. The final product has high chemical and radiochemical purity with a specific activity of 669 MBS/mnol. The overall radiochemical yield is 12 % .
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