## 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 trans-[13,14-14C2]-retinoic acid
✍ Scribed by Heinz Kaegi; Edward Chew; Ping-Lu Chien
- Publisher
- John Wiley and Sons
- Year
- 1980
- Tongue
- French
- Weight
- 248 KB
- Volume
- 17
- Category
- Article
- ISSN
- 0022-2135
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✦ Synopsis
Abstract
Trans‐[13,14‐^14^C~2~]‐Retinoic acid has been synthesized by condensation of β‐ionylideneacetaldehyde and ^14^C‐labeled methyl senecioate in the presence of potassium amide in ether. A convenient synthesis of the key intermediate, methyl (diethoxyphosphinyl)‐[2‐^14^C]acetate, is also described.
📜 SIMILAR VOLUMES
## Abstract A route to crystalline 13‐__cis__‐retinoic acid‐**6**,**7**‐^14^__C__ (**1**) has been developed. Addition of acetylene‐**1**,**2**‐^14^**C** to 6‐methyl‐5‐hepten‐2‐one (**4**) gave dehydrolinalool‐**1**,**2**‐^14^__C__ (**5**) which was catalytically transformed into citral‐**1**,**2**
Synthesis of Nitrilotriacetic Acid-2-14C
## Abstract [2‐^14^C]1,3,7,9‐, 0(2),1,7,9‐ and 0(8),1,3,7‐Tetramethyluric acid were prepared by methylation of [2‐^14^C]uric acid with dimethyl sulfate at pH 9. The yield after repeated (3x) purification by TLC was 44.9%, 4.4% and 6.3% respectively.