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202. Alkaloids from Croton species. Part IV. The isolation and structure of a new proaporphine derivative from Croton linearis Jacq.
203. A synthesis of choline phosphate.
204. Combretol from Combretum quadrangulare.
205. Vilsmeier reaction on 6-methylpurine.
206. High resolution mass spectrometry. Part IX. 2-Spiro-2′-(1′,3′-dithian) derivatives of 3-oxo-steroids.
207. High resolution mass spectrometry. Part VIII. The fragmentation of ring A in some 3-oxo-steroids.
208. Dalpanol, a new 6′-hydroxyrotenoid from a Dalbergia species.
209. Naturally occurring compounds related to phenalenone. Part I. The synthesis of lachnanthocarpone.
210. Amino-acids and peptides. Part XXXIII. Synthesis of Val5-angiotensin-II by the picolyl ester method.
211. Reaction of 1-amino-8-hydroxynaphthalene-3,6-disulphonic acid and its N-acyl and N-s-triazinyl derivatives with cyanuric chloride and 6-substituted 2,4-dichloro-s-triazines. Formation of O-s-triazinyl derivatives and peri-O-→ N-s-triazinyl rearrangements
212. Organometallic reactions. Part XIX. Some reactions of aldehydes with aminotin compounds.
213. Mechanism of pyrazoline formation from the reactions of substituted hydrazines and Mannich bases.
214. Isoxazolin-5-one.
215. 3,4-Dihydro-4-oxo-2H-1,3-benzoxazine-carboxylic acids.
216. Naturally occurring quinones. Part XVIII. New spinochromes from Diadema antillarum, Spatangus purpureus, and Temnopleurus toreumaticus.
217. Condensed thiophen ring systems. Part V. Synthesis, reactions, and stability of 2-methyl- and 2-methylthio-3-benzo[b]thienyl-lithium and related compounds.
218. Organophosphorus intermediates. Part III. The base-catalysed addition of methyl phenylphosphinate, dimethyl phosphonate, and diphenylphosphine oxide to tetraphenylcyclopentadienone.
219. Unsaturated carbohydrates. Part XIV. The isomerisation of hex-2-enopyranosylpurine nucleoside derivatives.
220. 4-Hydroxy-6-methylchromen-2-thione, and a sulphur analogue of dicoumarol.
221. The ‘trimer’ and ‘pentamer’ from the polymerisation of thiophen by polyphosphoric acid.
222. The conversion of gibberellin A13 into some δ-lactones related to gibberellin A15.
223. Azasteroids. Part VIII. Synthesis and stereochemistry of (±)-13-aza-18-norequilenin.
224. Azasteroids. Part IX. Synthesis of (±)-13-aza-15-thia-18-norequilenin and a study of Bischler–Napieralski cyclisation of N-acyl-2-(1-naphthyl)ethylamines.
225. Diels–Alder reaction of unsymmetrical dienes with unsymmetrical p-benzoquinones.
226. Diels–Alder reaction of unsymmetrical dienes with methyl acrylate.
227. Electrochemical reactions of fluoro-compounds. Part II. The preparation of substituted fluoro-aromatic derivatives.
228. Free-radical reactions of halogenated bridged polycyclic compounds. Part XI. Application of the Cristol–Firth reaction to some carboxylic acids containing a chloronorbornene ring system.
229. A novel bismethylene transfer to 2′-hydroxylated isoflavones by dimethylsulphoxonium methylide: study of the reaction and its products.
230. A synthesis of rosenonolactone and deoxyrosenonolactone.
231. Selective esterification, substitutions (S N1), and transformations of flavan-3,3′,4,4′,7-pentaols.
232. Reactions of phosphorus compounds. Part XXIII. Preparation and reactions of several α-substituted vinylphosphonium salts.
233. Highly fluorinated heterocycles. Part IV. The fluorination of tetrachlorothiophen, thiophen, and tetrahydrothiophen over cobaltic and manganic trifluorides and over potassium tetrafluorocobaltate(III).
234. Highly fluorinated heterocycles. Part VI. Fluorination and rearrangement of 1,4-dithian.
235. Heterocyclic studies. Part XV. Synthesis and covalent hydration of pteridine-4-carboxylic acid, -4-carboxamide, and -4-carbonitrile.
236. Reactions of steroid A-ring lactones with Grignard reagents.
237. Allene cycloadditions. Part I. Reaction of tetrafluoroethylene with allenic hydrocarbons.
238. Allene cycloadditions. Part II. Reaction of a dialkylallene with unsymmetrical fluoro-olefins: evidence for a two-step [2 + 2] cycloaddition.
239. Photolysis of some cyclopentadioxinones.
240. Simple pyrimidines. Part XII. Synthesis and methylation of some 2-amino-5-phenylpyrimidines.
241. Biosynthesis of phenols. Part XXII. Synthesis of 3-isopentyl-2,6-dimethoxyphenyl-(3,6-dimethoxy-2,4-dimethylphenyl)methane, a degradation product of arugosin.
242. Pyrroles and related compounds. Part XV. Differential protection of pyrrole rings during porphyrin synthesis. Syntheses of mesoporphyrin-XI.
243. Pyrroles and related compounds. Part XVI. Synthesis of protoporphyrin-IX by the a- and b-oxobilane routes.
244. Pyrroles and related compounds. Part XVII. Porphyrin synthesis through b-bilenes.
245. Amino-acids and peptides. Part X. Characterisation of the monamycins, members of a new family of cyclodepsipeptide antibiotics.
246. Amino-acids and peptides. Part XI. (3R,5S)-5-chloropiperazic acid and (3S,5S)-5-hydroxypiperazic acid, products of hydrolysis of monamycin.
247. Amino-acids and peptides. Part XII. The molecular structures of the monamycins, cyclodepsipeptide antibiotics.
248. Formation of nickel tetradehydrocorrin derivatives and the reduction of nickel 1,19-dimethyltetrahydrocorrin salts.
249. Steroids. Part XIII. Boron trifluoride-catalysed rearrangement of 3β-acetoxy-5,6α-epoxy-19-methyl-5α-cholestane.
250. Propyl homologue of tetrahydrocannabinol: its isolation from Cannabis, properties, and synthesis.
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