2,3-O-Isopropylidene-1-O-p-tolylsulfonylglycerol

2,3-O-Isopropyl­idene-1-O-p-tolyl­sulfonylglycerol

In the title compound, C(13)H(18)O(5)S, the five-membered ring has an envelope conformation. The packing involves four C-H⋯O inter-actions, three of which combine to form layers of mol-ecules parallel to the bc plane.

O-23: "Caring My Family Integrity"

A stereoselective total synthesis of 7,8-O-isopropylidene iriomoteolide-3a.

A stereoselective total synthesis of 7,8-O-isopropylidene iriomoteolide-3a has been achieved by using Yamaguchi esterification, Julia-Kocienski olefination, organocatalytic α-oxidation, and ring-closing metathesis reaction as key bond-forming steps.

[μ-10,21-Dimethyl-3,6,14,17-tetra­aza­tricyclo­[17.3.1.18,12]tetra­cosa-1(23),8(24),9,11,19,21-hexa­ene-23,24-diolato-κ8 N 3,N 6,O 23,O 24:N 14,N 17,O 23,O 24]bis­[(nitrato-κ2 O,O′)nickel(II)]

In the title centrosymmetric dinuclear nickel complex, [Ni(2)(C(22)H(30)N(4)O(2))(NO(3))(2)], each of the two Ni(II) atoms has a distorted octa-hedral geometry, defined by two N atoms and two O atoms from the macrocyclic ligand and two O atoms from a chelating nitrate anion. The two Ni atoms are bridged by two phenolate O atoms, forming a four-membered Ni(2)O(2) ring.

Poly[tetra­aqua­bis­(μ3-oxalato-κ5 O 1,O 2:O 1′:O 1′,O 2′)(μ2-oxalato-κ4 O 1,O 2:O 1′,O 2′)dipraseodymium(III)]

In the title complex, [Pr(2)(C(2)O(4))(3)(H(2)O)(4)](n), the two independent Pr(III) ions are both nine-coordinated in a distorted monocapped square-anti-prismatic geometry by seven O atoms from four oxalate ligands and two water mol-ecules. The Pr(III) ions are bridged by the oxalate ligands, forming a layer parallel to (001). O-H⋯O hydrogen bonds connect the layers.