## Abstract [4‐^13^C]‐porphobilinogen 1a, [3‐^13^C]‐porphobilinogen 1b and [11‐^13^C]‐porphobilinogen 1c are prepared from [1‐^13^C]‐3‐(tetrahydropyran‐2′‐yloxy)‐propionaldehyde 2a, methyl [4‐^13^C]‐4‐nitrobutyrate 3b and [1‐^13^C]‐isocyanoacetonitrile 5c, respectively. The building blocks 2, 3 and
Synthesis of cyclopentadienyl-X-13C thallium
✍ Scribed by Samuel D. Larsen; Phillip J. Vergumini; Thomas W. Whaley
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- French
- Weight
- 273 KB
- Volume
- 11
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
Cyaclopentadienyl thallium has been prepared with one carbon position labeled at a concentration greater than 90 atom % carbon‐13. A new method for incorporating a carbon‐13 label into cyclopentadiene is reported which relies on the reaction of the di‐Grignard reagent of 1,4‐dibromobutane with isopropyl formate^13^C. The product of this reaction, cyclopentanol‐1‐^13^C, is converted to cyclopentadienyl‐X‐^13^C thallium.
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