Milkweed Family

Dihydroxynaphthalene and 9,10-diacetoxyphenanthrene react with 1,2-diols and 1,2-dithiols in a one-pot synthesis of annulated 2,3-dihydro-1,4-dioxins and -1,4-dithiins (Scheme 26) <04TL1343>. The reaction of 2,3-dihydroxynaphthalene with 1,2-dihalogenated aromatic compounds leads to linearly annulated dioxins of particular interest are tri- and tetra-dioxins and various hetero-fused dioxins e.g. 62 (34%). Several examples yield cation radical salts on electrocrystallisation <04T8899>. Linear arrays of fused pyran-dioxin-cyclohexane rings as found in natural products derived from the milkweed family have been described e.g. 63 <04EJO4911>. 

Most members of the milkweed family (Asclepiadaceae) and many members of the related family Apocynaceae synthesize cardiac glycosides. These substances are both bitter... 

Although this family is pantropical, most of its members are South American. A few genera extend into temperate regions one of these is Lhc familiar milkweed, Asclepias syriaca. Some are ornamentals, some yield rubber, others are livestock poisons. The taxonomy of the family is not a matter of general agreement. 

Milkweeds are various species of perennial plants in the family Asclepiadaceae, a mostly tropical group that contains more than 1,800 species. Most species in this... 

The latex of milkweeds and other species in the family Asclepiadaceae can be used to make a natural rubber. During World War II, when supplies of rubber from Asia were not readily available in North America, research was undertaken to see whether this strategically important material could be obtained from milkweeds under cultivation. However, the yields of rubber were too small to make this enterprise worthwhile. 

The genera in the family of Asclepiadaceae (Table 1) inclnde milkweed and periploca. 

Thus, noteworthy is the sap or juice from members of the genus Asclepias, or milkweed, of the family Asclepiadaceae, as indicated elsewhere, and which contains alkaloids (e.g., Hoffman, 1999, p. 505). Traditionally, such tissue-destroying chemicals as phenol (carbolic acid) have been used to selectively remove warts (although... 

A small family of tropical or subtropical butterflies with only a few members like the milkweed or monarch species. Their wingspan extends to 7-10 cm, and their annual mass migration is spectacular the North American Monarch butterflies (Danaus plexippus) fly in autumn from southern Canada as far south as Mexico and Florida. 

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