Zur Kenntnis des Hartmanilakopals

Plantes De Nouvelle-Caledonie. LXXVII. Diterpènes D'Agathis lanceolata

“…Les fractions (Fig a F32) foumissent un mélange de deux acides qui sont estérifiés et séparés par chromatographie sur colonne de gel de sílice (pentane/ether: 4/1). On (1)(2)(3)(4) en présence de CH2N2. 1) Agathadiol (5a) (36): a 777 mg de 2c en solution dans 50 ml d'éther anhydre, on ajoute 1,5 g de LiAlH4.…”

Manila Resins Origin, Properties, and Applications

“…Several chemists have published reports of research on the chemical constitution of Manila resin, but the results are diverse, and the samples in some cases are so illy defined that it is difficult to say just how much is accurately known (4,(7)(8)(9)(10)(11).…”

“…that of shellac, though their spirit varnish films are much more brittle, some work has been devoted to modifying Manilas so as to provide acceptable substitutes for shellac. A product only slightly inferior to shellac in hardness and toughness of film may be obtained by fusing the copal with as much as 30 per cent of a partially oxidized fatty acid and as much as 10 per cent of beeswax.…”