## OC-Sulfobenzylpenicillin as a new semi-synthetic penicillin having a broad antibiotic spectrum against Gram-positive and negative bacteria was first prepared in these laboratories and has already been supplied to clinical use. Moreover, many semisynthetic penicillins and cephalosporins have bee
Synthesis of 7-amino-9a-methoxy-10-[14C]carbamoyl mitosane (10-[14C]carbamoyl mitomycin C)
✍ Scribed by U. J. Haynes; J. E. Swigor; T. Kaneko
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- French
- Weight
- 155 KB
- Volume
- 28
- Category
- Article
- ISSN
- 0022-2135
No coin nor oath required. For personal study only.
✦ Synopsis
Abstract
The synthesis of the title compound (5) is described. Treatment of mitomycin C with sodium methoxide gave decarbamoyl mitomycin C (2). Reaction with acetic anhydride in methanol yielded N1a‐acetyl‐mitomycin C (3). Treatment with [^14^C]phosgene in the presence of N,N‐dimethylaniline yielded [^14^C]chloroformate (4). Conversion of the chloroformate to the carbamate and removal of the protecting group with excess ammonia produced the title compound (5).
📜 SIMILAR VOLUMES
## Abstract The preparation of 6,7‐dihydro[1,2,3,4,10‐^14^C]aldrin is reported by catalytic reduction of [1,2,3,4,10‐^14^C]aldrin. Modification of previously published conditions afforded the desired product in 97.1% yield as assayed by electron capture gas chromatography. The convenient one vessel
## Abstract trans‐7,8‐Dihydrobenzo[a]pyrene‐7,8‐diol‐7‐^14^C (VI) and (±)‐7α,8β‐dihydroxy‐9β,10β‐epoxy‐7,8,9,10‐tetrahydrobenzo[a]‐pyrene‐7‐^14^C (VII) were prepared at a specific activity of 53.9 mCi/mmole by a multi‐step synthetic sequence using K^14^CN as the labeled precursor. The overall radio
## Abstract Carbon‐14 labeled Gadoteridol, [1,4,7‐Tris(carboxymethyl)‐10‐(2‐hydroxy‐1‐[^14^C]propyl)‐1,4,7,10‐tetraazacyclododecanato]gadolinium, was prepared from 1‐[^14^C] propylene oxide in a total yield of 30.4% and a radiochemical purity of 99.2%.
## Abstract The novel [^14^C]‐labelled 3‐carbamoyl‐4‐hydroxycoumarins were prepared in two steps from 4‐chloro‐acetylsalicyloyl chloride (3). The isotope was incorporated by the reaction of diethyl malonate‐1,3‐^14^C with 4‐chloro‐acetylsalicyloyl chloride (3). Subsequent condensation of the result