## Abstract Further investigations on the chemistry of catharanthine have provided information, valuable in the estimation of reactivity and steric requirements of the skeleton. Specific hydroxylations at C(3), C(4) and C(18) have allowed the preparation of several derivatives including (3R, 4 R)‐3
Total Synthesis of Indole and Dihydroindole Alkaloids. XV. Further Chemistry of Vindoline
✍ Scribed by James P. Kutney; Ursula Bunzli-Trepp; Toshio Honda; Junki Katsube; Brian R. Worth
- Publisher
- John Wiley and Sons
- Year
- 1978
- Tongue
- German
- Weight
- 763 KB
- Volume
- 61
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Abstract
The general reactivity of various sites in the vindoline series has been investigated. The facility of electrophilic substitution at C(15) and the effect of steric crowding on reactions at C(4) are discussed. At the basic nitrogen sites, oxidations with mercuric acetate and potassium permanganate are also discussed.
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## Abstract The synthesis and conformational analysis of (3′__R__)‐3‐hydroxyleurosidine (**5**), (3′__S__)‐3‐hydroxyleurosidine (**10**), (3′__S__)‐3‐acetoxy‐4′‐deoxyleurosidine (**15**), (3′__R__)‐3‐acetoxy‐4′‐deoxyleurosidine (**23**), (3′__R__)‐3‐acetoxy‐4′‐deoxyvinblastine (**16**), (3′__S__)‐3
## Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable v
Synthetic (+)-makomakine (6) was transformed in six steps into (+)-( 17 R,18R)-17,18-dihydrohobartine-17,18-diol((+)-5) with an overall yield of 38 % (Scheme 2). This compound was shown to be identical with natural hobartinol, a monoterpene indole alkaloid from Aristoteliu uustrulusicu, originally b