Castasterone (22R,23R,24S)-2\u3b1,3\u3b1,22,23-tetrahydroxy-5\u3b1- ergostan-6-one (1) and its (22S,23S)-isomer have been synthesized from (20S)-6\u3b2-acetoxy-3\u3b1,5-cyclo-5\u3b1-pregnane-20-carbaldehyde. The side chain with the correct stereochemistry was constructed via a Claisen rearrangement and the nuclear functionalities were introduced by osmilation of the intermediate obtained by opening of the cyclopropane ring with hydrochloric acid and dehydrohalogenation
The syntheses of three structurally related substances, (±)-5-deoxovariecolin (204), (±)-5-deoxyvar...
The synthesis of 24-prochiral methylene steroids from nor-ketones, illustrated by the preparation of...
PART I. An attempted synthesis of tetrahydro-beta-vetivone, shown by St. Pfau and Plattner to be (B)...
An improved synthesis that could produce gram quantities of castasterone was proposed. The starting ...
611-614Wittig reaction on (2R, 3S)-2,3-isopropylidenedioxy-6,6-ethylene-dioxy-5 -pregnane-(20S)-20-...
This paper elaborates an improved synthesis of crinosterol and campesterol starting from stigmastero...
A stereoselective synthesis of crinosterol, (22E,24S)-ergosta-5,22-dien- 3\u3b2-ol, was developed fr...
In the last years, several research groups have been working on the synthesis of new steroidal plant...
Los brassinosteroides son un nuevo tipo de hormonas vegetales duenias de una poderosa actividad prom...
Spinastesterol (1a) and chrondrillasterol (1b) have been synthesized from the ethyl (22E,24S)- and (...
(22R,23R)- and (22S,23S)-2\u3b1,3\u3b1,22,23-Tetrahydroxy-B-homo-7-oxa- 5\u3b1-ergostan-6-one, two p...
A total synthesis of naturally occurring polychlorinated steroids, clionastatins A and B, was undert...
The synthesis of two isomeric brassinosteroids, analogues of brassinolide, containing the 2 beta,3 b...
Natural brassinosteroids are widespread in the plant kingdom and it is known that they play an impor...
The cyclopentyl compounds 113,114, and 115 and their enantiomers ent-113, ent-114 and ent-115 repres...
The syntheses of three structurally related substances, (±)-5-deoxovariecolin (204), (±)-5-deoxyvar...
The synthesis of 24-prochiral methylene steroids from nor-ketones, illustrated by the preparation of...
PART I. An attempted synthesis of tetrahydro-beta-vetivone, shown by St. Pfau and Plattner to be (B)...
An improved synthesis that could produce gram quantities of castasterone was proposed. The starting ...
611-614Wittig reaction on (2R, 3S)-2,3-isopropylidenedioxy-6,6-ethylene-dioxy-5 -pregnane-(20S)-20-...
This paper elaborates an improved synthesis of crinosterol and campesterol starting from stigmastero...
A stereoselective synthesis of crinosterol, (22E,24S)-ergosta-5,22-dien- 3\u3b2-ol, was developed fr...
In the last years, several research groups have been working on the synthesis of new steroidal plant...
Los brassinosteroides son un nuevo tipo de hormonas vegetales duenias de una poderosa actividad prom...
Spinastesterol (1a) and chrondrillasterol (1b) have been synthesized from the ethyl (22E,24S)- and (...
(22R,23R)- and (22S,23S)-2\u3b1,3\u3b1,22,23-Tetrahydroxy-B-homo-7-oxa- 5\u3b1-ergostan-6-one, two p...
A total synthesis of naturally occurring polychlorinated steroids, clionastatins A and B, was undert...
The synthesis of two isomeric brassinosteroids, analogues of brassinolide, containing the 2 beta,3 b...
Natural brassinosteroids are widespread in the plant kingdom and it is known that they play an impor...
The cyclopentyl compounds 113,114, and 115 and their enantiomers ent-113, ent-114 and ent-115 repres...
The syntheses of three structurally related substances, (±)-5-deoxovariecolin (204), (±)-5-deoxyvar...
The synthesis of 24-prochiral methylene steroids from nor-ketones, illustrated by the preparation of...
PART I. An attempted synthesis of tetrahydro-beta-vetivone, shown by St. Pfau and Plattner to be (B)...