摘要:
An inexpensive, stereoselective synthesis for nootkatone, tetrahydronootkatone, and their derivatives is disclosed. The starting materials used in the synthesis are inexpensive. The principal starting material, (−)-β-Pinene, is on the GRAS list (generally recognized as safe).
摘要:
There are disclosed are a method for producing at least one compound selected from a carbonyl compound and a hydroxy adduct compound by an oxidative cleavage or addition reaction of an olefinic double bond of an olefin compound, which contains reacting an olefin compound with hydrogen peroxide, utilizing as a catalyst, at least one member selected from (a) tungsten, (b) molybdenum, or (c) a tungsten or molybdenum metal compound containing (ia) tungsten or (ib) molybdenum and (ii) an element of Group IIIb, IVb, Vb or VIb excluding oxygen, and a catalyst composition.
摘要:
There are disclosed are a method for producing at least one compound selected from a carbonyl compound and a hydroxy adduct compound by an oxidative cleavage or addition reaction of an olefinic double bond of an olefin compound, which contains reacting an olefin compound with hydrogen peroxide, utilizing as a catalyst, at least one member selected from (a) tungsten, (b) molybdenum, or (c) a tungsten or molybdenum metal compound containing (ia) tungsten or (ib) molybdenum and (ii) an element of Group IIIb, IVb, Vb or VIb excluding oxygen, and a catalyst composition
摘要:
Compounds represented by the structural formulae ##STR1## wherein n is an integer 0 or 1; A, B and C each independently represent hydrogen or alkyl having from 1 to 3 carbon atoms, provided that when n is 0 at least one of A, B or C cannot be hydrogen; R represents hydrogen or an alkyl having from 1 to 6 carbon atoms; D and E each independently represent hydrogen or alkyl having from 1 to 6 carbon atoms, provided that the sum of the carbon atoms in D and E does not exceed 6, provided that, in the bicyclo compounds, at least one of A, B, C, D or E must be an alkyl; m is an integer 1 through 8; F and G represent hydrogen or alkyl having from 1 to 3 carbon atoms; X represents ##STR2## WHEREIN P IS AN INTEGER 0 THROUGH 2 AND I and J each independently represent hydrogen or methyl, provided that if p is 0 then m must be greater than 2; provided that the sum of the carbon and oxygen atoms in the compound is no greater than 23, are useful as fragrances or as components in fragrance compositions. These compounds have very pleasant, strong and long-lasting aromas. Novel compounds are also disclosed.
摘要:
A chiral phosphorus-based ligand, in single enantiomer form, which is capable of complexing a transition metal atom and of acting as a ligand in asymmetric chemical catalysts, which comprises the partial structureR.sup.1 R.sup.2 P--O--C--X--Y--C--O--PR.sup.1 R.sup.2 (I)wherein each of X and Y is C or a heteroatom; the C--X--Y--C chain forms part of a linearly-fused bicyclic structure; and either R.sup.1 and R.sup.2 are each independently H or an organic group of up to 20 carbon atoms, including alkyl, fluoroalkyl, aryl, alkylaryl, alkoxy, aryloxy, and alkylaryloxy, or PR.sup.1 R.sup.2 is cyclic such that R.sup.1 and R.sup.2 are covalently linked, optionally with additional substituents.
摘要翻译:含有部分结构的R1R2P-OCXYCO-PR1R2(I)的能够使过渡金属原子络合并用作不对称化学催化剂中配体的手性磷基配体,其中X和Y分别为 是C或杂原子; C-X-Y-C链形成线性稠合双环结构的一部分; R 1和R 2各自独立地为H或至多20个碳原子的有机基团,包括烷基,氟烷基,芳基,烷基芳基,烷氧基,芳氧基和烷基芳氧基,或者PR1R2是环状的,使得R 1和R 2共价连接, 具有另外的取代基。
摘要:
A process for producing 3,4-caranediol of the formula [I] includes subjecting 3,4-epoxycarane, which is obtained by epoxidizing 3-carene under specific conditions, to a hydration reaction in the presence of a base catalyst in aqueous ethanol under pressure to obtain 3,4-caranediol.